问题

_____in the ticket hall for almost an hour, I suddenly realized I had left my ID card home.[ ]

A: To wait
B: To have waited
C: Waiting
D: Having waited

正确答案是：

同类题型

Do you like volleyball—Yes, . It’s interesting.

The earthquake damaged many houses and bridges; ______, it caused over 2,300 deaths

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I’m than Jack, so I can carry this heavy box.

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