The engineer examined the machine for over two hours and finally ________ what was wrong with it.

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Scientists ________ in many ways for their contributions _______ the development and progress of human society.

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A．always honor; to

B．always honor; for

C．are always honored; to

D．are always honored; for

My father doesn’t like the ________ of the city life, so he prefers to stay in the countryside.

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It’s Sarah’s birthday tomorrow. Will you ________ me in buying a present for her?

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If you to Xi’an, you’ll find the palaces there more magnificent than commonly ________.

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Have a good rest, you need to _______ your energy for the tennis match this afternoon.

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Several children are away from school because of ________.

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There was nothing to ________ us doing it.

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Be careful when you cross this very busy street. If not, you may ________ run over by a car.

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“Thank you for ________ him to give up the project so that we can save the loss.”

“Not at all.”

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