单项选择题

I missed a very good chance. I（）that work when it was offered.

A．should take
B．should have taken
C．had taken
D．took

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单项选择题
She liked to stay at home. She had previously traveled seldom and then only （）

A．When necessary
B．what possible
C．which necessary
D．while possible
单项选择题
Little（）about his own safety, though he was in great danger himself.

A．does he care
B．he cared
C．did he care
D．he cares
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