Yesterday, when I went past the classroom, I _______ someone _______
A.hear, singing
B.heard, singing
C.heard, sang
D.hear, sang
网友回答
B解析考查感官动词的用法。句意“昨天，当我经过教室时，我听见有人住在唱歌。”hear sb. do sth.“听见某人做了某事”；hear sb. doing sth.“听见某人正在做某事”。因为是昨天，故用一般过去时，排除A、D；hear后用动词原形或现在分词。故选B。