问题
单项选择题
— 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
参考答案：A
解析： 考查动词短语词义辨析。本题创没的语境是打电话，break up“拆散，分解”；give up“放弃”；hold up“延误，阻挡”；hang up“挂断(电话)，挂起”；符合语境，故选A。