You may leave the classroom when you __________ writing.
A. will finish
B. are finishing
C. have finished
D. had finished
Giải bởi Vietjack
Chọn đáp án C
A: Do you know our town at all?
B: No. It is the first time I __________ here.
A: Who’s that pretty girl Tom dancing with?
B: I don’t know. I __________ her before.
