单项选择题

It has been estimated that the earth's surface temperature has increased
______ one quarter to three quarters of a degree since 1850. ~

A．to
B．by
C．at
D．with
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单项选择题
The prisoner has been ______ of many privileges that average citizens enjoy.
A．ensured
B．informed
C．deprived
D．convinced
单项选择题
A．comparableB．comparativeC．companionableD．considerable
A．comparable
B．comparative
C．companionable
D．considerable
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