What do we know about terrorism？
A. It is always overshadowed by human goodness.
B. It shocks us again with its evilness.
C. It was somehow predicted.
D. It happens all the time.
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The disaster offers an opportunity for people who work extra hard to ______.
A. quit their previous life-style
B. calculate the cost of their business
C. work even harder
D. reflect on their success
A language is not a natural and living language unless ______.
A. it is invented
B. it is changing
C. it has a complex language system
D. it can be used naturally
He ______ his head, wondering how to solve the problem.
A. scrapped
B. screws
C. scraped
D. scratched
Betty broke the school rules and regulations repeatedly so the principal finally had no alternative but to ______her.
A. exile
B. detain
C. expel
D. eject
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