单项选择题

It is a common theme in many science fiction stories that the world may one day be ______ by outer space invaders.

A. broken in
B. taken over
C. run over
D. filled in
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Only in recent years ______ begun to realize the importance of Internet.
A. people have
B. have people
C. that people have
D. since have people
单项选择题
It would seem more ______ to apply standards flexibly rather than rigidly.
A. insensitive
B. allergic
C. sensible
D. infected
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