_____ in the queue for half an hour, Tom
题型:选择题
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
_____ 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