单项选择题

What would happen if a person were supported by the life preserver in a wrong position

A．The waves would move him backwards.
B．The water would choke him.
C．He would immediately sink to the bottom.
D．He might be exhausted or unconscious.
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单项选择题
From the passage it can be inferred that ______.
A．all school children are offered a course in the use of computer
B．all unemployed workers are being retrained
C．in reality only a certain portion of unemployed workers will be retrained
D．retraining programmes are considered very important by the government
单项选择题
Which of the following is NOT mentioned in the passage
A．Computers are efficient in retraining unemployed workers.
B．Computers may offer more working opportunities than they destroy.
C．Computers will increase the unemployment rate of young blacks.
D．Computers can help smaller organizations to function more effectively.
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