题目内容
11、Only after he had spent several nights working on the maths problem to wonder whether the problem was wrongly set．
A．did he begin B．he began C．he did begin D．began he
试题答案
11、A
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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
查看习题详情和答案>>Only after he had spent several nights working on the maths problem_______to wonder whether the problem was wrongly set.
A did he begin B, he began C, he did begin D, began he
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