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Children _______ sit in the front seat of a car. It’s too dangerous.

A. need           B.needn’t                C.must            D.mustn’t

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阅读理解,阅读下列短文,从每题所给的四个选项中,选出最佳选项

Dear Linda,

I have been in England for three months now.I hope you don’t think I’ve forgotten you.There have been so many places to see and so many things to do that I’ve not had much time for writing letters.

I shall soon be starting my studies at King’s College.So far I’ve been learning about England and British ways of living.I won’t tell you about London.There are plenty of books you can read and plenty of pictures you can look at.I’m sure you’ll be more interested to know what I think about the life here.

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Yours

Alice

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In order to study black bears, researchers from New Jersey, USA, catch bears and use drugs to help them go to sleep. Researchers then work out the size and the weight of the bear, take blood to test for diseases, remove a tooth and take it to the lab to find out its age. From these studies, researchers want to find out how many bears live in New Jersey, how long they live, and how many babies they produce.

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