单项选择题

A．In areas with few weeds and unwanted plants.
B．In areas with a severe shortage of water.
C．In areas lacking in chemical fertilizer.
D．In areas dependent on imported food.
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单项选择题
Men make up 60% of global labour force.
A．Y
B．N
C．NG
单项选择题
A．Become a member of the Committee for the Exchange of Foreign Students.B．Find the organization sponsoring him.C．Learn how to get accustomed to the life in the United States.D．Stay in a foreign country for six months.
A．Become a member of the Committee for the Exchange of Foreign Students.
B．Find the organization sponsoring him.
C．Learn how to get accustomed to the life in the United States.
D．Stay in a foreign country for six months.
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