单项选择题

Since you have failed three of the last four tests, you cannot afford to be ______ about passing for the term.

A．courteous
B．relevant
C．optimistic
D．passive
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单项选择题
It is regrettable that the author saved many of his most brilliant lines for the By that time, most of the audience had left.
A．epilogue
B．climax
C．curtain
D．book
单项选择题
At last the girl couldn't bear the self-reproach, so she decided to ______ the fraud that made the poor old lady no penny left.
A．show up
B．show out
C．show off
D．show through
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