We should pick up the i_____ to keep the streets clean.

We should pick up the i_____ to keep the streets clean. they keep the streets clean by picking up rubbish _________d We can help to Clean up the city streets in our free time (对 We should keep the nice room clean They keep the streets clean by picking up rubbish.（划线部分在by p we should keep the water clean(改为一般疑问句） We should keep the water clean 的汉语意思是? we should keep the river clean.(一般疑问句） they clean keep streets the.连词成句 students,should,and,keep,clean,up,the,it,school,yard,clean 英语：keep用法1.We must keep the classroom .A.clean B.to clean C. we must keep the classroom______- A.clean B.to clean C.clean