问题

________ I got on the bus, he got off.
A: s
B: While
C:Until
D: Till
B: While
C:Until
D: Till
正确答案是:
同类题型
A smile costs ______, but gives so much.
I thought about ______ over and over in my head and finally worked out how to do it.
Usually,the organizing committee should have a________meeting every two weeks.
I think_______ ask Tim for some advice.-_______. Last time when I turned to him, he refused to help.