Jane likes singing.We often hear her after class.A. singB. to singC. singsD. singing

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(答案→)A. sing
B. to sing
C. sings
D. singing
解析：
试题分析:此题重点考查固定短语hear sb do sth表示听到某人经常做某事。此句的含义是Jane喜欢唱歌，我们经常听到她下课后就唱歌。故选C。