School integration plans that involve busing between suburban and central-city areas have contributed, according to a recent study, to significant increases in housing integration, which, in turn, reduces any future need for busing.
(A) significant increases in housing integration, which, in turn, reduces
(B) significant integration increases in housing, which, in turn, reduces
(C) increase housing integration significantly, which, in turn, reduces
(D) increase housing integration significantly, in turn reducing
(E) significantly increase housing integration, which, in turn, reduce
ans: a
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我選D
我一開始看也是直覺a好像比較對
可是我看到說: "which, in turn, reduces...."
然後which是refer to "School integration plans"
所以覺得reduce應該要沒有 S
當然我的答案錯了...
我想請問一下,在這裡,是不是因為 which 是 singular,所以用reduces??
麻煩解釋一下..