They keep the streets clean by picking up rubbish.（划线部分在by p

They keep the streets clean by picking up rubbish.（划线部分在by p they keep the streets clean by picking up rubbish _________d they clean keep streets the.连词成句 they went to the park by bike.对划线部分提问,划线部分by bike. They go to the cinema by car划线部分提问 We should pick up the i_____ to keep the streets clean. I ( ) this kitchen clean by the streets after 8:00pm in this They can get there by bus（对划线部分提问,划线部分是by bus） They can clean the bedroom英语对划线部分提问clean the bedroom是划线部分 they celebrate the festival by singing and dancing（对划线部分提问） They will send their homework to the teachers by email(就划线部分 They went to london by plane把by london划线(对划线部分提问