单选题：

__53__some of their books are available in different covers.

A.so

B.if

C.until

D.though

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单选题：

books about Harry Potter have a__54__cover for young readers and then another more serious cover for adults.

A.useful

B.lively

C.valuable

D.strange

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单选题：

So next time you are on a train or bus, look around and see what other people are__55__  ,  but don't jump to any conclusions (结论). You will probably be wrong.

A.eating

B.watching

C.thinking

D.reading

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单选题：

If you see a policeman running__56__a person

A.before

B.after

C.at

D.beside

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单选题：

Maybe the person is a thief (小偷) and__57__some valuable things.

A.stole

B.made

C.bought

D.borrowed

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单选题：

For example, you may see somebody__58__a heavy coat.

A.taking off

B.taking away

C.putting back

D.putting on

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单选题：

__59__would make him put it on？

A.What

B.Why

C.Where

D.Which

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单选题：

 He is going to work outdoors and the weather is__60__  .

A.warm

B.cold

C.cool

D.hot

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单选题：

He is going to__61__a ski race in the mountains.

A.direct

B.watch

C.manage

D.attend

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单选题：

Each of these things__62__be a cause for putting it on.

A.could

B.must

C.should

D.need

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