Our teachers ask us ( ) (not litter) on the ground.We should ( )(keep) our classroom clean.

分类: 作业答案 • 2021-12-19 11:48:56

问题描述：

答

not to litter ...keep

答

Our teachers ask us (not to litter ) (not litter) on the ground.We should (keep )(keep) our classroom clean.

答

not to litter
keep
ask sb.no to do sth.叫某人别做某事
should do sth.应该做某事