I heard my sister ________ an English song when I passed by her room last night._刷题宝

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I heard my sister ________ an English song when I passed by her room last night.

A．was singing	B．singing
C．to sing	D．sing

上一题下一题 0.64难度单项选择更新时间:2015-01-15 07:10:45

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