单项选择题

Though this apparatus is expensive, the patient agreed to use it after the operation because it could ______ the pain.

A．assess
B．alleviate
C．avenge
D．affirm
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单项选择题
The world-famous British Museum which houses a ______ collection of valuable books, paintings, works of arts, etc. attracts millions of visitors every year.
A．immersible
B．miscellaneous
C．overwhelming
D．unified
单项选择题
After some time the second stage of the space shuttle, having used up its fuel, just like the booster, separates and ______.
A．runs away
B．charges for
C．falls off
D．merges into
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