单项选择题

Canning (is) the (most wide) used (method) of food (preservation).

A．is
B．most wide
C．method
D．preservation
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单项选择题
He is opposed (to) the project (for the reason why) it is not (feasible) (for the time being).
A．to
B．for the reason why
C．feasible
D．for the time being
单项选择题
Having (finished) his term paper (before the deadline), (it was delivered) to the profes-sor (before) the class.
A．finished
B．before the deadline
C．it was delivered
D．before
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