单项选择题

Studies have proven that recycling

A. reduces carbon emissions in most cases.
B. only reduces emissions if it is not done using road transport.
C. reduces carbon emissions in a limited number of cases.

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单项选择题

Recycling

A. has been going no for a centuries.
B. began during the industrial revolution.
C. started as a business in the United States.

单项选择题

Austria and the Netherlands recycle

A. more municipal waste than any other countries.
B. more municipal waste than any other European countries.
C. more than half of their municipal waste.