So difficult ___it to work out the problem that I decided to ask Tom for advice.
题型：不详难度：来源：
So difficult ___it to work out the problem that I decided to ask Tom for advice.| A．I did find | B．did I find | C．I have found | D．have I found |
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答案
| B |
解析
| 句意：发现解决这个问题如此困难，所以我答应向汤姆咨询一下。So位于句首，应使用部分倒装。另外本句用过去时态。 |
举一反三
________should the young _______illegal behavior.| A．On no account, take in | B．Under no circumstances. take to | | C．In no way, take after | D．With no means, take on |
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Only when the villagers were faced with water shortage___ how serious the problem of water pollution was．| A．did they realize | B．will they realize | C．they did realize | D．were they realized |
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_______, he talks a lot about his favorite singers after class.| A．A quiet student as he may be | B．Quiet student as he may be | | C．Be a quiet student as he may | D．Quiet as he may be a student |
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No sooner ______ home ______ I told him the exciting news.| A．had he got; when | B．had he got; than | | C．he had got; when | D．he had got; than |
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Only after the plane had taken off _________ that he missed his parents so much.| A．he found | B．he had found | C．did he find | D．was he found |
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