单项选择题

______ with air, a life jacket will keep a person afloat.

A．It is filled
B．Filling
C．When filled
D．When filling it
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单项选择题
I could see that my wife was ______ having that fur coat, whether I approved of it or not.
A．adequate for
B．intent on
C．eager to
D．deficient in
单项选择题
The doctor recommends me ______ on a strict diet.
A．to go
B．going
C．I should go
D．go
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