单项选择题

How long does it take for 200 hectares of rainforest to be destroyed

A．About 3 minutes.
B．About 200 minutes.
C．About 3 days.
D．About 3 seconds.
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单项选择题
Why was hemp banned in the United States
A．Because it can produce marijuana.
B．Because it is poisonous.
C．Because it is related to the marijuana plant.
D．Because it is harmful to human body.
单项选择题
Why do some people think hemp is better than trees for paper industry
A．It is cheaper to grow hemp than to cut down trees.
B．More paper can be produced from the same area of land.
C．Hemp planting can beautify the environment.
D．Hemp can produce paper of high quality.
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