1 . There is always a lot of traffic at this time of day. So I ________ arrive a bit late.
| A．might | B．can | C．needn’t | D．mustn’t |
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2 . Now most young people like shopping online because they ________ spend a lot of time going from shop to shop.
| A．needn't | B．can't | C．mustn't | D．shouldn't |
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3 . —Mum, must I come back before five o'clock?
—No, you ________. Just get home before dinner.
—No, you ________. Just get home before dinner.
| A．mustn’t | B．needn't | C．shouldn't | D．couldn't |
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4 . The designer has tried every possible way to make the robot light, so you_______worry about its weight.
| A．must | B．may | C．can't | D．needn't |
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