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
He was very ______ to go, but he has no other choice.
A．reluctant
B．willing
C．eager
D．keen
单项选择题
They had ______ from the path and found themselves at the feet of a hill.
A．wandered
B．waited
C．wired
D．walked
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