题目

—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：A　[考查动词短语辨析。根据第一个说话者说“该上课了”可知此处选hang up，意为“挂断电话”。break up 打碎，解散，结束，终止关系；give up 放弃；hold up 举起，阻挡，拦截，均与题意不符。]

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