There are many children _____basketball on the playground.A.playingB.are playingC.to playD.play

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There are many children _____basketball on the playground.A.playingB.are playingC.to playD.play
There are many children _____basketball on the playground.
A.playing
B.are playing
C.to play
D.play

There are many children _____basketball on the playground.A.playingB.are playingC.to playD.play
A.playing
There be+名词+doing sth:正在做某事

A.
球类前不加the。由are得是现在进行时。