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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The teacher makes sure, too, that the children will get enough rest and play, ______ (在接受教育的同时).
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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