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.
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单项选择题
What has happened to hemp in recent years
A．People have struggled for its legalization.
B．Canadian people have succeeded in legalizing it for fiber.
C．People have tried to make it accepted that hemp is not addictive.
D．Both A and B.
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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