问题

_____in the queue for half an hour，the old man suddenly realized he had left the cheque in the car.

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

正确答案是：

同类题型

When I was a little girl, I ________ with my uncle for several years

We didn’t know you were in trouble at thattime; _______ we would have given you a hand

I think we all need to help animals live __________.

Sam has been appointed ____ manager of engineeringdepartment to take ____place of Tim.

His hair is shorter than_______.______.