单项选择题

He failed once again in his experiment, but he didn't feel ______.

A．frustrated
B．encouraged
C．puzzled
D．endangered
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单项选择题
Really, Edwin is afraid of Angela, but the ______is also true: Angela is afraid of Edwin, too.
A．inversion
B．insertion
C．version
D．reverse
单项选择题
The story you told me the other day has yet to be ______.
A．confessed
B．confirmed
C．conquered
D．conformed
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