Question

【题目】The teenagers are often heard ________pop songs instead of Peking Opera.

A. sing B. sang C. to sing D. sung

Answer 1

【答案】C

【解析】句意：人们经常听到青少年唱流行歌曲而不是京剧。A. sing动词，唱歌；B. sang过去式，唱歌；C. to sing不定式，唱歌；D. sung过去分词，唱歌。固定短语hear sb. do sth.听见某人做某事，省略to的动词不定式作宾补；本题为此短语的被动式，省略的to要还原出来。故选：C。