1. 比较对象的时态不一样, 要补主语(或用代词)+动词/助动词.

例: 10.A large rise in the number of housing starts in the coming year should boost new construction dollars by several billion dollars, making the construction industry’s economic health much more robust than five years ago.
(A) making the construction industry’s economic health much more robust than five years ago
(B) and make the construction industry’s economic health much more robust than five years ago
(C) making the construction industry’s economic health much more robust than it was five years ago
(D) to make the construction industry’s economic health much more robust than five years ago
E) in making the construction industry’s economic health much more robust than it as five years ago

the key:C

22.A recent national study of the public schools shows that there are now one microcomputer for every thirty-two pupils, four times as many than there were four years ago.

(A) there are now one microcomputer for every thirty-two pupils, four times as many than there were

(B) there is now one microcomputer for every thirty-two pupils, four times as many than there were

(C) there is now one microcomputer for every thirty-two pupils, four times as many as there were

(D) every thirty-two pupils now have one microcomputer, four times as many than there were

(E) every thirty-two pupils now has one microcomputer, four times as many as

the key:C。

2. 比较对象有情态动词, 要补情态动词.

例:

*168.Because the Earth’s crust is more solid there and thus better able to transmit shock waves, an earthquake of a given magnitude typically devastates an area 100 times greater in the eastern United States than it does in the West.

(A) of a given magnitude typically devastates an area 100 times greater in the eastern LACE>United StatesLACE> than it does in the West

(B) of a given magnitude will typically devastate 100 times the area if it occurs in the eastern LACE>United StatesLACE> instead of the West

(C) will typically devastate 100 times the area in the eastern LACE>United StatesLACE> than one of the comparable magnitude occurring in the West

(D) in the eastern LACE>United StatesLACE> will typically devastate an area 100 times greater than will a quake of comparable magnitude occurring in the West

(E) that occurs in the eastern United States will typically devastate 100 times more area than if it occurred with comparable magnitude in the West

the key: D

大全729 The development of a new jumbo rocket that is expected to carry the LACE>United StatesLACE> into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost.

(A) The development of a new jumbo rocket that is expected to carry the United States into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost.

(B) The development of a new jumbo rocket is expected to carry the United States into its next phase of space exploration and be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle.

(C) The new development of a jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle.

(D) A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle can, and at a lower cost.

(E) A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle and to cost less.

答案D。

3. THAN 与前面的比较部分中间有其它成分, 要补动词/助动词.

例:

BE+MORE+ADJ.+…+THAN(补)

1. The pay of senior executives increased in 1990 by a larger percentage than did the wages of other salaried workers.

2. As a result of the continuing decline in the birth rate, fewer people will enter the labor force in the 1980’s than did in the 1960’s and 1970’s, a twenty-year period during which people born after the war swelled the ranks of workers. (主语people相同且无定语成分则省之，但did不能省)

BE+ MORE+ADJ. + THAN(不补)

1. Even though Bela Bartok’s music has proved less popular than Igor Stravinsky’s and less influential than Arnold Schonberg’s, it is no less important.

2. In 1982 the median income for married-couple families with a wage-earning wife was $9,000 more than that for families in which only the husband was employed.

34.A wildlife expert predicts that the reintroduction of the caribou into northern Minnesota would fail if the density of the timber wolf population in that region is more numerous than one wolf for every 39 square miles.

(A) would fail if the density of the timber wolf population in that region is more numerous than

(B) would fail provided the density of the timber wolf population in that region is more than

(C) should fail if the timber wolf density in that region was greater than

(D) will fail if the density of the timber wolf population in that region is greater than

(E) will fail if the timber wolf density in that region were more numerous than

the key

4. THAN 后连接时间状语/ 地点状语, 要补代词+助动词/动词

例: 10.A large rise in the number of housing starts in the coming year should boost new construction dollars by several billion dollars, making the construction industry’s economic health much more robust than five years ago.

(F) making the construction industry’s economic health much more robust than five years ago

(G) and make the construction industry’s economic health much more robust than five years ago

(H) making the construction industry’s economic health much more robust than it was five years ago

(I) to make the construction industry’s economic health much more robust than five years ago

(J) in making the construction industry’s economic health much more robust than it as five years ago

the key:C

22.A recent national study of the public schools shows that there are now one microcomputer for every thirty-two pupils, four times as many than there were four years ago.

(F) there are now one microcomputer for every thirty-two pupils, four times as many than there were

(G) there is now one microcomputer for every thirty-two pupils, four times as many than there were

(H) there is now one microcomputer for every thirty-two pupils, four times as many as there were

(I) every thirty-two pupils now have one microcomputer, four times as many than there were

(J) every thirty-two pupils now has one microcomputer, four times as many as

the key:C。

5. 其余都不用补动词或助动词:

32.A study commissioned by the Department of Agriculture showed that if calves exercise and associated with other calves, they will require less medication and gain weight quicker than do those raised in confinement.

(A) associated with other calves, they will require less medication and gain weight quicker than do

(B) associated with other calves, they require less medication and gain weight quicker than

(C) associate with other calves, they required less medication and will gain weight quicker than do

(D) associate with other calves, they have required less medication and will gain weight more quickly than do

(E) associate with other calves, they require less medication and gain weight more quickly than

the key:E

35.According to a panel of health officials, there has been a great deal of confusion in the medical profession about whether obesity is a biological disorder posing serious health risks or a condition more related to appearance than to health.

(A) about whether obesity is a biological disorder posing serious health risks or a condition more related to appearance than to

(B) with respect to obesity being a biological disorder posing serious health risks or if it is related more to appearance than

(C) over whether or not obesity is a biological disorder posing serious health risks or it is a condition more related to appearance than to

(D) about obesity and if it is a biological disorder posing serious health risks or a condition related to appearance more than to

(E) concerning whether obesity is a biological disorder posing serious health risks or it is a condition related to appearance more than

the key:A

38.According to a recent study, the elderly in the United States are four times more likely to give regular financial aid to their children as to receive it from them.

(A) the elderly in the United States are four times more likely to give regular financial aid to their children as

(B) the elderly in the United States are four times as likely to give regular financial aid to their children as it is for them

(C) the elderly in the United States are four times more likely to give regular financial aid to their children than

(D) it is four times more likely for the elderly in the United States to give regular financial aid to their children than they are

(E) it is four times as likely that the elderly in the United States will give their children regular financial aid as they are

the key:C。

42.According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.

(A) minority graduates are nearly four times more likely than are other graduates in planning to practice

(B) minority graduates are nearly four times more likely than other graduates who plan on practicing

(C) minority graduates are nearly four times as likely as other graduates to plan on practicing

(D) it is nearly four times more likely that minority graduates rather than other graduates will plan to practice

(E) it is nearly four times as likely for minority graduates than other graduates to plan to practice

the key: C

比较考点：倍数+as +adj./adv.+as

71.Aging is a property of all animals that reach a fixed size at maturity, and the variations in life spans among different species are far greater as that among individuals from the same species: a fruit fly is ancient at 40 days, a mouse at 3 years, a horse at 30, a man at 100, and some tortoises at 150.

(A) among different species are far greater as that among individuals from

(B) among different species are far greater than that among individuals from

(C) among different species are far greater than those among individuals of

(D) between different species are far more than that between individuals of

(E) between different species are greater by far than is that between individuals from

the key:C

156.Balding is much more common among White males than males of other races.

(A) than

(B) than among

(C) than is so of

(D) compared to

(E) in comparison with

the key:Ｂ

164.Because natural gas is composed mostly of methane, a simple hydrocarbon, vehicles powered by natural gas emit less of certain pollutants than the burning of gasoline or diesel fuel.

(A) less of certain pollutants than the burning of gasoline or diesel fuel

(B) fewer of certain pollutants than burning gasoline or diesel fuel do

(C) less of certain pollutants than gasoline or diesel fuel

(D) fewer of certain pollutants than does burning gasoline or diesel fuel

(E) less of certain pollutants than those burning gasoline or diesel fuel

the key: E

177.Bihar is India’s poorest state, with an annual per capita income of $111, lower than in the most impoverished countries of the world.

(A) lower than in

(B) lower than that of

(C) and lower than that of

(D) which is lower than in

(E) which is lower than it is in

the key: B

885 sec 3-24 In his eagerness to find a city worthy of Priam, the German archaeologist Schliemann cut through Troy and uncovered a civilization a thousand years older as was the city Homer’s heroes knew.

(A) older as was the city Homer’s heroes knew

(B) more ancient than the city known to Homer’s heroes

(C) older than was the city known to Homer’s heroes

(D) more ancient of a city than Homer’s heroes knew

(E) older of a city than was the one known to Homer’s heroes

ANSWER B.

OG-19 In addition to having more protein -than wheat does, the protein in rice is higher quality than that in wheat, with more of the amino acids essential to the human diet.

(A) the protein in rice is higher quality than that in

(B) rice has protein of higher quality than that in

(C) the protein in rice is higher in quality than it is in

(D) rice protein is higher in quality than it is in

(E) rice has a protein higher in quality than

答案是B。