单项选择题

Whatever ______ the difficulties, we must go on with the experiment.

A．were
B．be
C．should be
D．could be
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单项选择题
If I ______ the problem, I would do it in a different and rapid way.
A．would solve
B．shall solve
C．solve
D．were to solve
单项选择题
The bold soldier would rather die than ______ to these cruel enemies.
A．to yield
B．yielding
C．yield
D．have yielded
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