<!--[if !supportLists]-->1. <!--[endif]-->In good years, the patchwork of green fields that surround the LACE>LACENAME>San JoaquinLACENAME> LACETYPE>ValleyLACETYPE>LACE> town bustles to move around quickly, many of them in the area just for the season.>>

(A) surround the LACE>LACENAME>San Joaquin Valley town bustles with farm workers, many of them

(B) surrounds the San Joaquin Valley town bustles with farm workers, many of whom are

(C) surround the San Joaquin Valley town bustles with farm workers, many of who are

(D) surround the San Joaquin Valley town bustle with farm workers, many of which

（A）patchwork: something that is made up of a lot of different things

patchwork of

a patchwork of woods and fields, typical of the English countryside The area was a patchwork of local industries

(E) surrounds the San Joaquin Valley town bustles with farm workers, many are
1, why not 'many of whom' ?
2, why 'are ' is ommitted?
thanks

15. A new phenomena, which is visible at Managua’s major intersections, are waves of vendors and beggars, which include many children and mob cars at the stoplights.

(A) A new phenomena, which is visible at Managua’s major intersections, are waves of vendors and beggars, which include many children and

(B) Visible at Managua’s major intersections are waves of vendors and beggars with many children, new phenomena that

(C) A new phenomenon visible at Managua’s major intersections is waves of vendors and beggars, many of them children, who

(D) Phenomenally new waves of vendors, beggars, and many children are visible at Managua’s major intersections, which

(E) A wave of vendors and beggars, many of whom are children, are visible at Managua’s major intersections, where they are a new phenomenon and

the key:C 299 Florida will gain another quarter-million jobs this year alone, many of them in high-paying fields like electronics and banking, making the state’s economy far more diversified than ten years ago.

(A) high-paying fields like electronics and banking, making the state’s economy far more diversified than

(B) high-paying fields like electronics and banking, and making the state’s economy far more diversified than its economy

(C) high-paying fields such as electronics and banking, to make the state’s economy far more diversified than

(D) such high-paying fields as electronics and banking, making the state’s economy far more diversified than it was (E) such high-paying fields as electronics and banking, and make the state’s economy far more diversified than it was the key: D 498 Many of them chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with hundreds of monasteries.

(A) Many of them chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with hundreds of monasteries.

(B) Chiseled from solid rock centuries ago, the mountainous regions of northern Ethiopia are dotted with many hundreds of monasteries.

(C) Hundreds of monasteries, many of them chiseled from solid rock centuries ago, are dotting the mountainous regions of northern Ethiopia.

(D) The mountainous regions of northern Ethiopia are dotted with hundreds of monasteries, many of which are chiseled from solid rock centuries ago.

(E) The mountainous regions of northern Ethiopia are dotted with hundreds of monasteries, many of them chiseled from solid rock centuries ago.

the key: E

many of them...独立主格结构，很爽，没问题。（发现有独立主格的结构一般都是正确答案）

疑问是：B假设改为surround the LACE>LACENAME>San JoaquinLACENAME> LACETYPE>ValleyLACETYPE>LACE> town bustles with farm workers, many of whom are 是表达的有效性降低了，但没有语法错误呢？还是说就不应该这样用？？