问题

She says that she’ll have to close the shop ________ business improves
A:if
B:unless
C:after
D:when
B:unless
C:after
D:when
正确答案是:
同类题型
I haven’t been home to see my parents for two weeks; I _____ them. [ ]
Everybody in the village likes Jack because he is good at telling and___________ jokes.
I’m going to see my friend in the hospital.— your coat. It’s cold outside.
Look! A _______ man is crossing the street. Let’s go and help him.