单项选择题

The problems lies ______ the social injustices in this country.

A．in
B．to
C．with
D．down
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单项选择题
I am used ______ by air and only on one occasion have I ever felt frightened.
A．to travel
B．to traveling
C．traveling
D．to have traveled
单项选择题
The velvety texture of the rose ______ so soft and smooth.
A．fell
B．is felt
C．was feeling
D．was felt
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