单项选择题

A．Go to summer school.
B．Take a vacation.
C．Stay at home.
D．Earn some money.
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单项选择题
Which of the following statements concerning fingerprints is true
A．Only when people are arrested will their fingerprints be kept in the file.
B．In order to make fingerprints visible, you must use laser technology.
C．Even when the fingerprints found are incomplete, their whole patterns can be constructed with the help of computer.
D．Fingerprints won’’t be left on rough surfaces.
单项选择题
What can we infer from the last paragraph
A．The defendants will confess to the crime as long as their fingerprints are detected at the crime scenes.
B．Even the fingerprints of someone were found at the crime scenes, they sometimes can’’t serve as the decisive evidence.
C．The high-tech will help the experts to determine the how long the fingerprints had been left.
D．The scene of the crime needs to be examined carefully.
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