Tony couldn't go to university but__________his education through evening school courses.

A．continue

B．continued

C．continues

D．to continue

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参考答案

考查时态。本题关键是理解but的作用。结合题目和选项可以看出，but在此用作连词，连接两个并列句，后一分句承前省略了主语Tony。既然是并列句，那么前后分句的时态应保持一致，故[B]正确。注意，此题并非cannot(…)but…这种用法，在这种用法中，but后用动词原形。

1 Do you agree that power is __________makes things work?

A．nothing

B．anything

C．what

D．that

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2 She is __________ interested in physics. She often works at it until__________into the night.

A．deep; deep

B．deep; deeply

C．deeply; deep

D．deeply; deeply

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3 What shall we use for power when all the oil in the world has been __________.

A．given out

B．put out

C．held up

D．used up

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