— Why do you do volunteer work in the North—West？
— I_____ to improve the lives of the children there through my efforts．
| A．was trying | B．have tried |
| C．am trying | D．tried |
相关试题
—You know that you were driving at 100 kilometers per hour, don’t you?—No, officer, I _____ have been. This car can’t do more than 80.
| A．mustn’t | B．shouldn’t | C．may not | D．couldn’t |
—May I speak to the patient now?—No, you _____. He is too weak now.
| A．needn’t | B．may not | C．mustn’t | D．oughtn’t |
—Why am I so slow at doing the cloze test?—I guess you didn’t realize the use _____ the contexts.
| A．you should have made of |
B．you must have made from |
C．of which you could have from |
| D．out of which you need make |
My MP4 player isn’t in my bag. Where I have put it?
| A．can | B．must | C．should | D．would |
The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.相关知识点
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