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Listen! Someone ______ in the next room.
A．sing B．singing C．is singing D．are singing
Listen! Someone________in the next room．
A．
sing
B．
singing
C．
is singing
D．
are singing
Listen!Someone________songs．
—Listen! Someone ____________ on the street.—Singing? He is crying. A. is singing B. sing C. sings
—Listen! Someone ____________ on the street.
—Singing? He is crying.
A. is singing B. sing C. sings