题目内容

_______ on the tower, we could see the whole city.

A. Standing
B. Stand
C. Stood
D. To stand

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Tom, you _______ play with the knife. You _______ hurt yourself.

A. won’t; can’t
B. mustn’t; may
C. shouldn’t; must
D. can’t; shouldn’t

By the time he was 12, Edison _______ to make a living by himself.

A. would begin
B. has begun
C. had begun
D. was begun

I _______ my breakfast when the morning post came.

A. had
B. had been having
C. haven been having
D. was having

-Must I stay here for hours?-No, you _______, You can leave any time.

A. mustn’t
B. needn’t
C. can’t
D. wouldn’t

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