【题目】Upon____ the news that her daughter would be back in two days after being missing for five years, the poor mother broke down into tears
A. hearing B. hear
C. heard D. having heard
在线课程【答案】A
【解析】句意：一听到她失踪五年的女儿两天之后要回来的消息，这个可怜的母亲放声大哭。介词upon后接动名词，故选A。