单项选择题

A．Dr. Philips and his book on plagues.
B．Old diseases on the comeback and the reasons.
C．Diseases and their battles against human’’s control.
D．Cholera, its death and its revival.
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单项选择题
A．Jack could have run even faster.B．He can run faster than Jack in spite of his age.C．He could run faster than Jack when he was Jack’’s age.D．The woman is unfair in his judgement.
A．Jack could have run even faster.
B．He can run faster than Jack in spite of his age.
C．He could run faster than Jack when he was Jack’’s age.
D．The woman is unfair in his judgement.
单项选择题
It is more difficult to discover the criminals who committed with computer than those who committed without computer.
A．Y
B．N
C．NG
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