I’m sorry to keep you so long.——青夏教育精英家教网——

摘要：I’m sorry to keep you so long.

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I'm sorry to keep you _____ so long.

A. wait
B. to wait
C. waiting
D. waited

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I’m sorry to keep you so long.

A. wait B. waiting C. to wait D. waited

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I'm very sorry to keep you _ so long. I have something important to do.

A. wait
B. waiting
C. waiting for
D. waited

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I'm so sorry to keep you for a long time.

A. waiting
B. to wait
C. wait
D. waited

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用所给词的适当形式填空:

I'm sorry to keep you ______ (wait) so long.

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