on where for be yo-yo sit want what play dance 用上列所给词的适当形式填空：It's a fine Saturday.There ( ) many children in the park.they are ( )happily.Some are playing ( )under a big tree.Some girls are singing and ( ).Some boysare run

on where for be yo-yo sit want what play dance 用上列所给词的适当形式填空：
It's a fine Saturday.There ( ) many children in the park.they are ( )happily.Some are playing ( )under a big tree.Some girls are singing and ( ).Some boysare running ( )the ill.Li lei's ( ) by the lake.He's reading a story.( ) is Wang Lin?He's standing over there.( )is he doing?He's looking ( ) a nice butterfly.He ( )to catch it.

It's a fine Saturday.There (are ) many children in the park.they are ( playing )happily.Some are playing (yo-yo )under a big tree.Some girls are singing and ( dancing ).Some boys are running ( on)the hill.Li lei's ( sitting ) by the lake.He's reading a story.( Where) is Wang Lin?He's standing over there.(What )is he doing?He's looking ( for ) a nice butterfly.He (wants )to catch it.