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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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——Is there any possible way to help them get rid of such a bad habit?
——To tell the truth, it’s very hard. But we_______ on this problem.
A. worked B. had worked C. are working D. had been working
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We_______on this project for four hours. Let’s have a rest.
A. are working B. have been working C. worked D. had worked
查看习题详情和答案>>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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—Is there any possible way to help them get rid of such a bad habit?
—To tell the truth, it’s very hard. But we ________ on this problem, trying to improve the situation .
| A．worked | B．had worked | C．are working | D．had been working |