— Sorry, I have to now. It’s time for class.
— OK, I’ll call back later.
A. hang up
B. hang on
C. hold on
D. hold up
网友回答
(答案→)A. hang up
B. hang on
C. hold on
D. hold up
解析： 动词词义辨析题。A. hang up“挂断电话”B. hang on“等待“”C. hold on“不挂断”D. hold up“举起”根据句意“不得不挂断电话该上课了”所以选A。