单项选择题

Listen to the conversation and circle the appropriate letter. Dirty wool would __________ .

A．cause skin diseases in sheep.
B．provide a highly suitable food source for moths.
C．kill moths.
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单项选择题
Why do farmer not want to grow organic cotton
A．Because it is cheaper than conventional cotton.
B．Because organic cotton is more expensive to grow than conventional.
C．Because people don’t like to wear clothes made from organic cotton.
单项选择题
People should wear organic clothes to keep healthy.
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