单项选择题

Airplanes have made______.

A．easy and comfortable for us to travel
B．us to travel easily and comfortably
C．it easy and comfortable for us to travel
D．themselves easy and comfortable for us to travel
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单项选择题
The teacher, with 6 girls and 8 boys of her class,______ visiting a museum when the earthquake struck.
A．was
B．were
C．had been
D．would be
单项选择题
We were caught______a shower on our way home.
A．by
B．with
C．at
D．in
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