题目内容
So difficult ________ it to work out the problem that I decided to ask Tom for advice.
[ ]
A.I have found
B.have I found
C.I did find
D.did I find
答案:D
提示:
提示:
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so…that…结构位于句首,句子使用部分倒装。事情发生在过去,故用助动词did构成部分倒装。 |
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