問題詳情:
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 考查倒裝句。當“only+狀語”放在句首時,主句要用部分倒裝結構。
知識點:倒裝與省略
題型:選擇題