when the boy playing by the river fell into the river ,I was out of the room ____.A.in flash B.in a flash C.as a flash D.for a flash

The boy was playing basketball when a UFO l____. The 8-year-old boy hid __________(he) behind the door when playing hide-and-seek. The boy started playing the piano when he was four years old.(同义句）The boy started playing the piano ___ ___ ___ ___ ___ . when the boy was 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 The boy stopped playing computer games when he saw the () look on his father's face(seriously) the boy is playing basketball (对the boy提问) thanks! The ( ) boy is playing computer games. the boy is playing basketball.否定句 He like the boy playing basketball. 对吗. the boy is playing basketball(对is playing basketball提问). The boy is playing basketball(对is playing basketball提问). the boy is playing basketball?改一般疑问句the boy is playing basketball?求求您了. the boy is playing basketball 提问《is playing basketball.> 和,the boy> 怎么回答? when ()the boy()his homework when和since有什么区别?The man has been playing the guitar ___ he was a boy.为何这里只能填since?