单项选择题

Slotin did not call the hospital for help until ______.

A．the screwdriver slipped
B．a chain reaction began
C．he apologized to his co-workers
D．he calmly handled the accident
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单项选择题
The main idea of the passage is that______.
A．more students cheat on exams now than in the past
B．each era has a different concept of honour
C．there are still many individuals today who have a sense of honour
D．our society no longer values a sense of honour
单项选择题
Which is NOT true as far as the author's college life was concerned
A．Few students cheated on exams.
B．Students had an honour code.
C．Students did not tell teachers about their friends' cheating.
D．Teachers did not supervise exams.
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