This is always a busy time of year, but please don’t forget to recycle as much as you can.

22. Why shouldn’t we put plastic packaging into recycling bins?
A. Because it can’t be recycled at present.
B. Because the symbols on it advise us not to do so.
C. Because it is made of different types of plastic.
D. Because cost-effective ways to recycle it have not been founded.
23. What can we learn from the text?
A. The Christmas is the season for recycling.
B. All empty bottles can be put into the recycling bins.
C. There is a recycling center for the old clothes and shoes.
D. Christmas trees must be kept for future use.

答案21-23 B D C