题目内容
We _______ on this project for four hours. Let’s have a rest.
A. are working B. have been working C. worked D. had worked
B
练习册系列答案
相关题目
—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 |
We_______on this project for four hours. Let’s have a rest.
| A．are working | B．have been working | C．worked | D．had worked |
— Is there any possible way to help the children get rid of such a bad habit?
— To be honest, it’s very hard, but we ______on this problem.
|
A．work |
B．worked |
C．are working |
D．were working |