＿＿＿＿four years since I joined the army. A．There wasB．There isC．It wasD．It is
题型：不详难度：来源：
＿＿＿＿four years since I joined the army. | A．There was | B．There is | C．It was | D．It is |
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答案
| D |
解析
| 在it ＋be＋一段时间＋before／after／since句型中，before从句中的动作经过该段时间后才会实现；after从句中的动作完成后已经过去了一段时间；since从句中的动作完成后到现在已经有一段时间了。 |
举一反三
—— Was that the new comer who walked by?
—— ＿＿＿＿＿. | A．It must be that | B．It must have been | C．He must be | D．This must have been |
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I took ＿＿＿for granted that he would believe in us. | A．that | B．the thing | C．it | D．this |
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| He lived in poverty, and he couldn’t help ＿＿＿. |
| ＿＿＿＿＿is just like him to want to do something different from everybody else. |
We had to be patient because it＿＿＿some time ＿＿＿we got the full results. | A．has been ； since | B．had been ； until | | C．was； after | D．would be ； before |
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