( ) I’m sorry I’ve kept you for so long. A. wait B. waiting C. work D. to work——青夏教育精英家教网—

摘要：( ) I’m sorry I’ve kept you for so long. A. wait B. waiting C. work D. to work

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I'm sorry I've kept you ________ for so long.

[　　]

A． waiting　　　　　　B．wait

C．to wait　　　　　　D．waited

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