The boy was playing basketball when a UFO l____.

The boy was playing basketball when a UFO l____. the boy having finished his homework was playing the computer games这就话对吗the boy having finished his homework was playing the computer games与the boy finishing his homework was playing the computer games那句对? The boy with a group students____in the yard now.A.is playing B.was playing C.are playing D.were playing 改写 It is said that the little boy was playing the piano The boy was last seen being playing by the riverside with other boys 改错 The boy was seen ______on the sports ground.play / to play /playing The boy started playing the piano when he was four years old.(同义句）The boy started playing the piano ___ ___ ___ ___ ___ . 改错：Although the boy spent much time playing,but he was successful at last where is the ball _____ _____the boy was playing?这里要填什么关系代词 判断对错：I asked him who was that boy playing on the ground? the running boy the playing boy the boy playing football这三个都对吗 the running boy the playing boy the boy playing football这三个都对吗 The boy is playing near the i saw a boy.the boy was playing with a cat.i saw a boy _ _ _ _ a cat合并为一句 when the boy was The boy was seen ___on the playground.A.play B.to play C.played D.to playing. The boy was seen ______(play)basketball.Is it filled with playingorto play in the blanks? The little boy was last seen______football by the river.A.to play B.play C.played D.playing