单项选择题

The two psychologists had to modify the American Sign Language somewhat in order to accommodate the chimpanzees' spontaneous gestures.

A．change
B．abort
C．shorten
D．enhance
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单项选择题
Many politicians find that they can no longer afford the luxury of a personal chauffeur.
A．valet
B．driver
C．secretary
D．servant
单项选择题
Sometimes a dictionary designates a noun as attributive, which means that it can be used to describe another noun or name its attributes.
A．conveys
B．defines
C．indicates
D．explains
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