Onlyafterhehadspentseveralnightsworkingonthemathsproble...
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问题详情:
Only after he had spent several nights working on the maths problem ________to wonder whether the problem was wrongly set.
A.he began B.that he began
C.he did begin D.did he begin
【回答】
D 考查倒装句。当“only+状语”放在句首时,主句要用部分倒装结构。
知识点:倒装与省略
题型:选择题
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