填空题
The topic of this talk is______.
______
1 Busy families like to buy plastic bags because they
can______.
______
2 While going grocery shopping, the speaker suggests people
should take to grocery store______. ______
3 As a great amount of paper is consumed at work and school,
the speaker calls on people to______. ______ 4
What's the final proposal put forward by the speaker?
______ 5