3. c

we also watch flims________ smart phones

a. in

b.at

c.on

d.to

1 If we _________ waste paper, we will save a lot of trees.

A. repeat               B. recycle             C.rewrite               D. remark

2 you can save money while shopping by only buying_______ you need.

A. what                  B. this                   C. it                        D.that