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 class has 40 students, ______ 35 are girls.
A．who
B．whom
C．which
D．of whom
单项选择题
The two brothers are very ______.
A．alike
B．the same
C．similarly
D．likely
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