______, they would certainly come and help us.A．Had they timeB．Do they have tim
题型：不详难度：来源：
______, they would certainly come and help us.| A．Had they time | B．Do they have time | C．Had they have time | D．Did they had time |
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答案
| A |
解析
| 这是一个if引导的条件从句的省略，如果包含had, were, should, 或could, if的虚拟条件句省略时，就要将这些词放在主语前面作部分倒装。 |
举一反三
The enemy troop could hardly make any advance, and ________ could they fall back. | A．neither | B．so | C．either | D．both |
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Never before in our country_____.| A．has such a thing happened | B．such a thing has happened | | C．has so a thing has happened | D．so a thing has happened |
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Not until yesterday ______ anything about the project that will be completed soon.| A．did I learn | B．have I learnt | C．I learnt | D．that I learnt |
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Never ______ such a good boss before I came to this company.| A．do I meet | B．I met | C．had I met | D．I had met |
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Only when I saw Night Banquet a second time_______to appreciate its subject and music beauty.| A．did I begin | B．that I began | C．I began | D．had I began |
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