题目内容

______ his key, he couldn't enter the room.

A. Having been lost
B. Lose
C. He had lost
D. Having lost

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______ in the hall for half an hour, the old man suddenly realized he had left the wallet in the car.

A. Having waited
B. Wait
C. To wait
D. Being waited

______ all the letters, I went outand had a drink.

A. Finish
B. Having finished
C. To finish
D. Finishing

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A. built
B. to built
C. being built
D. building

Do you know the girl ______ by the window?

A. sits
B. to sit
C. sitting
D. sat