单项选择题

What happened to the man four years ago

A．He had a minor operation.
B．He had pneumonia.
C．He had a car accident.
D．He had long aftereffects.
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单项选择题
The expression step back in time at least a hundred years (Para.2) is intended to convey the idea that
A．college classrooms often remind people of their college life.
B．critical thinking was encouraged even a century ago.
C．a hundred years ago, desk arrangement in a classroom was quite different.
D．there is not much change in the college educational idea over the past hundred years.
单项选择题
Terrorists have obviously taken advantage of________
A．the legal privileges granted to foreigners.
B．the excessive hospitality of the American people.
C．the irresponsibility of the officials at border checkpoints.
D．the low efficiency of the Immigration and Naturalization Service.
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