单项选择题

A great many cancers can be cured but only if ______ before they have begun to spread or 'colonize' in other parts of the body.

A．properly treat
B．properly treating
C．being properly treated
D．properly treated
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单项选择题
The fishing boat sank below the waves, and was seen ______.
A．any more
B．not more
C．no more
D．not any
单项选择题
Freezing is at present one of the ______ of preserving meat, fruit and Vegetables.
A．most methods important
B．methods most important
C．most important methods
D．important most methods
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