单项选择题

He kept his head, otherwise the accident ______.

A. would happen
B. happened
C. would have happened
D. happens
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单项选择题
The passage is mainly about ______.
A．examinations in the ancient times
B．modern examinations
C．how to do well in an examination
D．setting questions for an examination
单项选择题
A．alreadyB．stillC．suchD．not
A．already
B．still
C．such
D．not
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