单项选择题

It is reported that there is no better _________ for mother's milk.

A．alternative
B．exchange
C．equivalent
D．substitute
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单项选择题
Mary was confused and she had not yet _________ what she was going to do.
A．figured out
B．carded on
C．brought about
D．caught at
单项选择题
After twenty years of doing nothing, Patrick was finally on the _________ road.
A．right
B．precise
C．accurate
D．exact
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