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
Scientist have to adapt their research to ‘economic needs’’ in order to ________ .
A．impress the public with their achievements
B．pursue knowledge for knowledge’’s sake
C．obtain funding from the government
D．translate knowledge into wealth
单项选择题
A．Whether they can afford the cost of the trip.B．Whether someone will take care of their house, garden and pets while they are away.C．Whether they should go by air or by sea.D．Whether the trip will keep them away from home for too long.
A．Whether they can afford the cost of the trip.
B．Whether someone will take care of their house, garden and pets while they are away.
C．Whether they should go by air or by sea.
D．Whether the trip will keep them away from home for too long.
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