单项选择题

A．To prevent the lookers-on from getting near.
B．To protect the injured men.
C．To let the fire engines and ambulances pass.
D．To cheek the leaking gas pipe.
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单项选择题
A．Do extra work if necessary.B．Change the spark plugs only.C．Clean the spark plugs only.D．Charge her more than ￡ 10 if necessary.
A．Do extra work if necessary.
B．Change the spark plugs only.
C．Clean the spark plugs only.
D．Charge her more than ￡ 10 if necessary.
单项选择题
A．Children reared under average conditions possess average intelligence.B．Lack of opportunity prevents the growth of intelligence.C．An individual’s intelligence is determined chiefly by his environment.D．Changes of environment produce changes in the brain structure.
A．Children reared under average conditions possess average intelligence.
B．Lack of opportunity prevents the growth of intelligence.
C．An individual’s intelligence is determined chiefly by his environment.
D．Changes of environment produce changes in the brain structure.
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