单项选择题

Nobody could figure out this problem.

A. make out
B. think of
C. solve
D. discover
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单项选择题
Two thirds of the sufferers of the disease were killed.
A. patients
B. spreaders
C. fans
D. pioneers
单项选择题
He confessed that he did not read the assigned book.
A. answered
B. agreed
C. admitted
D. alleged
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