单项选择题

The solution to the world's food problems depends on ______.

A．modern methods of farming
B．providing family farms
C．solving problems besides growing food
D．the help of "have" countries
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单项选择题
The tone of the story shows the author believes the problem is ______.
A．difficult to solve, perhaps impossible
B．difficult to solve but not impossible
C．impossible to solve
D．beyond the question
单项选择题
The main difficulty in solving the food problem is ______.
A．backward social and economical background
B．lack of information about food needs
C．conflicts between "haves" and "haves-not"
D．lack enough funds to modernize agriculture
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