单项选择题

It has been ______ that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.

A．calculated
B．estimated
C．measured
D．valued
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单项选择题
If a citizen's complaint is justified, the government will act ______.
A．on his behalf
B．on his account
C．for his sake
D．in his interest
单项选择题
Everyone has the right to live where he wants to, ______ the color of his skin.
A．in spite of
B．with respect to
C．in terms of
D．regardless of
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