GWD-TN-6逻辑题求解~

GWD-8-Q19: GWD-2-12
Which of the following most logically completes the passage?
Concerned about financial well-being of its elderly citizens, thegovernment of Runagia decided two years ago to increase by 20 percent thegovernment-provided pension paid to all Runagians over 65.  Inflation in the intervening period has beennegligible, and the increase has been duly received by all eligibleRunagians.  Nevertheless, many of themare no better off financially than they were before the increase, in large partbecause ________.
A.    They rely entirely on the government pension for their income
B.    Runagian banks are so inefficient that it can take up to three weeks tocash a pension check
C.    They buy goods whose prices tend to rise especially fast in times ofinflation
D.    The pension was increased when the number of elderly Runagians below thepoverty level reached an all-time high
E.    In Runagia children typically supplement the income of elderly parents,but only by enough to provide them with a comfortable living
为什么不选D呀？
GWD-8-Q21:GWD-2-18
Last year all refuse collected by Shelbyville city services wasincinerated.  This incineration generateda large quantity of residue ash.  Inorder to reduce the amount of residue ash Shelbyville generates this year tohalf of last year’s total, the city has revamped its collection program.  This year city services will separate forrecycling enough refuse to reduce the number of truckloads of refuse to beincinerated to half of last year’s number.

Which of the following is required for the revamped collection programto achieve its aim?
A.    This year, no materials that city services could separate for recyclingwill be incinerated.
B.    Separating recyclable materials from materials to be incinerated willcost Shelbyville less than half what it cost last year to dispose of theresidue ash.
C.    Refuse collected by city services will contain a larger proportion ofrecyclable materials this year than it did last year.
D.    The refuse incinerated this year will generate no more residue ash pertruckload incinerated than did the refuse incinerated last year.
E.    The total quantity of refuse collected by Shelbyville city services thisyear will be no greater than that collected last year.
木有看懂这个题...

GWD-8-Q33:

Inorder to withstand tidal currents, juvenile horseshoe crabs frequently burrowin the sand. Such burrowing discourages barnacles from clinging to theirshells. When fully grown, however, the crabs can readily withstand tidalcurrents without burrowing, and thus they acquire substantial populations ofbarnacles. Surprisingly, in areas where tidal currents are very weak, juvenilehorseshoe crabs are found not to have significant barnacle populations, eventhough they seldom burrow.
Whichof the following, if true, most helps to explain the surprising finding?
A. Tidalcurrents do not themselves dislodge barnacles from the shells of horseshoecrabs.
B. Barnaclesmost readily attach themselves to horseshoe crabs in areas where tidal currentsare weakest.
C. Thestrength of the tidal currents in a given location varies widely over thecourse of a day.
D. Avery large barnacle population can significantly decrease the ability of ahorseshoe crab to find food.
E.    Untilthey are fully grown, horseshoe crabs shed their shells and grow new onesseveral times a year.
木有看懂这个题..

求解答啊...