—Do you hear the noise outside?—Yes. There must be some kids __________ outside.

题干

—Do you hear the noise outside?
—Yes. There must be some kids __________ outside.

A．have fun

B．has fun

C．to have fun

D．having fun

上一题下一题 0.85难度单选题更新时间:2011-11-24 11:20:15

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