摘要：Listen! Someone are singing in the next room.

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Listen! Someone ______ in the next room.

D．are singing

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Listen! Someone ______ in the next room.

A．sing B．singing C．is singing D．are singing

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Listen! Someone________in the next room．
[　　]
A．	sing
B．	singing
C．	is singing
D．	are singing

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Listen! Someone ______ in the next room.

D．are singing

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Listen! Someone ________ in the next room.

A.
sing
B.
singing
C.
is singing
D.
are singing

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