We must stop（） the litter on the beach to keep it clean.A.putting B.to put C.picking up D.to pick up

分类: 作业答案 • 2021-12-20 03:19:03

问题描述：

We must stop（） the litter on the beach to keep it clean.
A.putting B.to put C.picking up D.to pick up

答

We must stop（ ） the litter on the beach to keep it clean.A.putting B.to put C.picking up D.to pick up