33．Bread and butter____________ for breakfast in many Chinese homes nowadays.A．s

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33．Bread and butter____________ for breakfast in many Chinese homes nowadays.

A．serve

B．servers

C．is served

D．are served

答案

解析

略

举一反三

One third of the workers in this city ______ now on strike.

A．is to be 　　　

B．is 　　　

C．are to be 　　　

D．are

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35. — Is your father still in bed?
— No, he ______ and ______ for you in the dining room now.

A．is already up; waits

B．got up; waiting

C．has got up; waited

D．is already up; waiting

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29．—The cleaning must have taken you quite a long time yesterday．
—Right．The rooms ______ for two months．

A．haven"t been cleaned	B．didn"t clean
C．hadn"t been cleaned	D．hadn"t cleaned

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34．—Your colleague"s spoken English is beautiful, Lily．
—It"s no wonder．She ____ in the USA for a year as a visiting professor．

A．worked

B．has worked

C．had worked

D．has been working

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—That’s the third time he’s won the award in this field.
—Yes. He his maximum potential in the past decade.

A．explored

B．is exploring

C．has been exploring

D．had explored

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