单项选择题

______ a certain doubt among the students as to the necessity of the work.

A．There existed
B．They had
C．There had
D．It existed
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单项选择题
From time to time we must look up words ______.
A．the meanings of those we do not know
B．whose meanings we are not familiar
C．that we do not know their meanings
D．whose meanings we do not know
单项选择题
Janet has learned to drive, but she's like to have ______.
A．the own car
B．the car of her own
C．an own car
D．a car of her own
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