问题补充:
---- Sorry, I have to now. It’s time for class.
---- OK, I’ll call back later.
A. hang up
B. break up
C. give up
D. hold up
答案:
(答案→)A. hang up
B. break up
C. give up
D. hold up
解析:词义辨析题。A. hang up 挂断电话 B. break up 解散 C. give up放弃 D. hold up 坚持住“很抱歉我要挂电话了,上课时间到了”“好的,一会我再打电话给你”根据回答当中的call back可知双方是在通电话,所以选择与打电话有关的词语。