问题补充:
—Sorry, I have to now. It’s time for class.
—OK. I’II call back later.
A. break up
B. hang up
C. give up
D. hold up
答案:
A. break up
(答案→)B. hang up
C. give up
D. hold up
解析:A. break up打碎,分手; B. hang up 挂断电话,搁置 C. give up 放弃; D. hold up举起,阻止;句意:对不起,我不得不挂电话了,该上课了。好的,我稍后给你打过来。故选B.