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
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The chair is not comfortable to sit in. It needs ______.
A．adjust
B．adjusting
C．adjusted
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It is reported that the police ______ the case.
A．is looking on
B．are looking into
C．is looking after
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