问题

ung couple, who returned my wallet, left _____ I could ask for their names.
A:before
B:while
C:after D.since;
D:since;
B:while
C:after D.since;
D:since;
正确答案是:
同类题型
______ you call me to say you’re not coming, I’ll see you at the theatre.[ ]
I don’t want to go shopping. _______, I haven’t got any money.
It’s bad _______ you to eat too much __________ you’re too fat.
__ this is not the right way to thestation, what shall we be ________ to do
John was made the car for a week as a punishment by his parents.