单项选择题

He left________ an important detail in his account.

A．off
B．over
C．behind
D．out
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单项选择题
The author’s attitude towards American education can be best described as________.
A．favorable
B．negative
C．tolerant
D．unfriendly
单项选择题
The bridge was named_________ the hero who gave his life for the cause of the people.
A．after
B．for
C．because of
D．before
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