Can you hear a girl( )in the next room?Who can it be?A.sing B.singing When did you stop( )TV last

Can you hear a girl( )in the next room?Who can it be?A.sing B.singing When did you stop( )TV last
night?A.watching B.watch C.watched D.to watch
He( )(快速)gets up and runs out of the room to school.
We are old enough to look after( )(we).
I am interested in( )(make)model planes.
Andy is crazy about( )(sing)songs.