问题

can I ask you a favor――_______
A:before
B:since
C:when
D:that
B:since
C:when
D:that
正确答案是:
同类题型
What are you busy with—The exhibition ____ in the city next week.
Why is he so happy—He_______ becoming an Olympic torchbearer.
In Scandinavian countries it iscommon ____ for the husband to stay at home to look after the baby.
Rock music ______ sound popular with the young, but it’s not the favor of the aged people.