问题

________ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.

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

正确答案是：

同类题型

ving worked out the problem, _____leave the office．

They would rather spend time _____ than _____ in the street.

Shered with D．remained

He has a ____ daughter.

In the past five years Tomlison with hisdaughter _______all over the world