单项选择题

Thomas would have been more successful if he had studied harder, ______.

A．didn't he
B．wouldn't he
C．hadn't he
D．hasn't he
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单项选择题
There ______ no rain, the ground was dry.
A．would have been
B．having been
C．had been
D．was
单项选择题
It is better to die on one's feet than ______.
A．live on one's knees
B．to live on one's knees
C．live at one's knees
D．to live at one's knees
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