单项选择题

[A] invent [C] teach
[B] discover [D] continue

A．discover
B．invent [C] teach
C．continue
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单项选择题
[A] making [C] expressing[B] changing [D] giving
A．making
B．changing
C．expressing
D．giving
单项选择题
[A] frightening [C] exciting[B] fearing [D] pleasing
A．frightening
B．fearing
C．exciting
D．pleasing
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