单项选择题

This passage explains ______.

A．how to make a stone wall in New England
B．why there are so many stone walls in New England
C．which parts of New England first used stone walls
D．why the fields in New England are so thin and rocky

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热门试题

单项选择题

The author of the passage thinks that ______.

A．the Framingham study is of doubtful validity
B．the "Ideal Weights" tables may not be very accurate
C．most people should lose weight
D．most people should put on weight

单项选择题

According to this passage, farming is difficult in New England because ______.

A．the winter is very long there
B．the farms are very old
C．the soil is rocky and thin
D．there is not enough machinery for farming