单项选择题

We find it hard to break free from ideas connected with living on the earth because

A．it demands too great an effort for us to do so.
B．we are too familiar with the way things are to question the ideas.
C．we have proved that those ideas are correct.
D．we are so sure of ourselves that we never doubt anything on the earth.
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单项选择题
We do not feel the gravitational pull of a packet of butter because
A．it is too small to have a gravitational pull of its own.
B．its pull is so small that we tend to ignore it.
C．its pull disappears in the presence of the earth's gravitation.
D．it tends to melt and loses its gravitational pull.
单项选择题
It is implied in the passage that the writer takes a(n) ______ attitude towards the mall.
A．critical
B．indifferent
C．fair
D．one-sided
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