Listen.There must be someone_____ in the classroom
Listen.There must be someone_____ in the classroom
A.sings B.to sings C.sing D.singing
A.sings B.to sings C.sing D.singing
英语人气:139 ℃时间:2020-01-25 22:07:44
优质解答
Listen.There must be someone__D.singing___ in the classroom选D???是的,选D,前面listen已经说明是现在进行时
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