单项选择题

Ellsworth decided that climate and temperature have ______ .

A．a great effect on everybody's intelligence
B．some effect on a few persons' intelligence
C．some effect on most persons' intelligence
D．no effect on most persons' intelligence
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单项选择题
The two best seasons for thinking seem to be ______ .
A．winter and spring
B．summer and spring
C．fall and summer
D．spring and fall
单项选择题
Let's go shopping, ______
A．shall we
B．do we
C．don't you
D．don't we
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