We________on this project for four hours.Let"s have a rest.A．are workingB．have b
题型：不详难度：来源：
We________on this project for four hours.Let"s have a rest.| A．are working | B．have been working | | C．worked | D．had worked |
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答案
| B |
解析
| B [考查时态。从for four hours以及下文的Let"s have a rest.可以看出是谓语动词表示的动作到目前为止已经持续了一段时间并有可能继续下去，所以用现在完成进行时。] |
举一反三
It"s going to rain.Tom，will you please help me________the clothes on the line?| A．get off | B．get back | C．get in | D．get on |
|
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Prices of daily goods________through a computer can be lower than store prices.| A．are bought | B．bought | | C．been bought | D．buying |
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