单项选择题

The most obvious and rapid change in the development of a language takes place in the area of ______.

A．pronunciation
B．vocabulary
C．grammar
D．speech
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单项选择题
Hawthorne generally concerned himself with such issues as ______ in his fictions.
A．the evil in man's heart
B．the material pursuit
C．the racial conflict
D．the social inequality
单项选择题
A cold dish of raw vegetables with a dressing is called ______.
A．hamburger
B．sandwich
C．salad
D．pudding
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