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
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单项选择题
The eyes were large and brown, the mouth sweet and sensitive, and the face itself a ______ oval.
A．frail
B．vulnerable
C．fragile
D．delicate
单项选择题
A．unfavorablyB．favorablyC．fairlyD．unfairly
A．unfavorably
B．favorably
C．fairly
D．unfairly
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