请教各位XDJM: 为什么这道题的答案是A,而不是C呢?
C中,WHILE 引导转折从句,ONCE表示'一度'...
Where once the union had acquiesced to the prejudices of its English-speaking members by supporting the imposition of an alien tax on immigrant workers, after 1897 the United Mine Workers made a determined effort to enlist Italians and Slavs in its ranks.fficeffice" />
(A) Where once the union had acquiesced to the prejudices of its English-speaking members by supporting
(B) Where once the union acquiesced to it English-speaking members’ prejudice for the support of
(C) While once the union had acquiesced to the prejudices of its English-speaking members in support of
(D) While once the union acquiesced to its English-speaking members’ prejudice in supporting(A)
(E) While once the union had acquiesced to the prejudices of its English-speaking members in its supporting of
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