—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
网友回答
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.