1)Most of the world’s fresh water ____ at the North and South Poles.A. are frozen B. is freezing C. is frozen D. have been frozen
2)This newpaper is made of _______ paper. A, recycle B, recycled C, old D, waste
3)Please collect sll recyclable materials, and take them to the _______factory A, recycle B, recycled C, recyclable D, recycling
4)If we ____ waste paper, we will save a lot of trees. A, recycle B, remake C, repeat D, rewrite
5)These materials can be ____ into other packaging products. A. reused B. reduced C. removed D. recycled