— We must using plastic bags in order to protect our earth..— Yes we mustn’t any more.A.

问题补充：

— We must using plastic bags in order to protect our earth..

— Yes, we mustn’t any more.

A. give out; put up

B. give up; put off

C. give away; put away

D. give in; put on

答案：

A. give out; put up

(答案→)B. give up; put off

C. give away; put away

D. give in; put on

解析：give out分发，公布；give up放弃，交出；give away放弃，泄露；give in屈服，让步；put up提供,建造；put off推迟，阻止；put away放好，储存；put on穿上，上演。句意：为了保护我们的地球，我们必须放弃使用塑料袋。——是的，我们再也不能拖延了。结合语境可知选B。