Though I have often heard this song , I have never heard you it.A．b_刷题宝

题干

Though I have often heard this song , I have never heard you it.

A．being sung; sang	B．sung; sing
C．sang; singing	D．to be sung; to sing

上一题下一题 0.4难度单项选择更新时间:2018-08-03 04:08:08

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