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1. You ..... finish the exercise now. Do it for homework.
A. mustn't B. shouldn't C. don't have to

2. You have to work hard to ...... good marks.
A. get B. do C. pass

3. Steve: What do you do in your free ...?
Helen: I play a lot of sports. I love volleyball.
A. life B. hours C. time

4. We were at beach but we .... swim because it was too cold.
A. mustn't B. couldn't C. shouldn't

5. I got a C in my Maths exam ..... do it again to try to get an A or a B ?
A. should I B. I have to C. was I