单项选择题

The old tradition will undoubtedly die out, ______ is a law of nature.

A．that
B．which
C．what
D．so
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单项选择题
I was amazed at ______ he behaved.
A．what
B．that
C．the way
D．way that
单项选择题
Neither he nor ______ ever been to the United States.
A．have I
B．I have
C．am I
D．I am
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