单项选择题

If she had studied harder, she ______.

A．wouldn't have failed
B．hadn't failed
C．should fail
D．wouldn't fail
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单项选择题
Lily looked so sad because she had ______ by her friends.
A．laughed
B．laughed at
C．been laughed
D．been laughed at
单项选择题
Jim ______ be a basketball player, for he is much too short.
A．needn't
B．can't
C．shouldn't
D．may
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