单项选择题
What would be the best title for this passage
A.Important Keys to Recycling Paper
B.Technological Advances Improve Recycling
C.Steps to Improving Recycling
D.Best Ways to Protect Our Environment
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单项选择题
According to the article, paper materials that arc difficult to recycle include ______.
A.copy paper
B.document shred
C.food wrappers
D.bottles and cans
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单项选择题
Which is NOT one of the main keys to recycling as mentioned in the passage
A.Government regulation of waste.
B.A more informed public.
C.Better technology.
D.More demand for recycled materials.
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