We heard him ________ in the next room just now.A．singingB．sangC．to singD．sung_刷题宝

题干

We heard him ________ in the next room just now.

A．singing

B．sang

C．to sing

D．sung

上一题下一题 0.4难度单选题更新时间:2019-05-16 03:52:06

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