( ) 20.________ they finished their homework,they went to bed.A．Before B．Until C．After D．While 为什么不是B

________?Yes,they havejijiji they are ________ (twin) sister. they are ________ (twin) sisters. we can see some____in the zoo.they are________,________,________,________,________,________,________________,________,________,and_______. There are______months in a year,They are_____,_______,________,________,________,________. 英语翻译They have a house ______ ______ ________ ________. They think ________（different）from you. They have ________(little) work to do. what are those they are ________. 英语翻译They ________ for 20 years. They discussed ________ (buy) a second car. What (be) they ____(do)?They ________(play)checkers. They will break the bridge,won’t they?The bridge ________ _________ ________by them,____ ________? They need more sleep 同义句 They need ________ _______ ________. 急 They are chatting with other.（对划线部分提问） 　　_______ ________ they ________ They are good for me.改为否定句They are ________ ________ me. 根据划线部分提问.1 They're playing basketballl.________ ________ they ________?2 They're going to climb the mountain.________ ________they ________to________ ( ) 20.________ they finished their homework,they went to bed.A．Before B．Until C．After D．While 为什么不是B