单项选择题

By 1900 the American automobile age had begun—12 companies produced a（）of more than 4,000 ears.

A. total
B. number
C. quantity
D. whole

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单项选择题
What is this man’s occupation（）

A.Salesman. 
B.Sportsman. 
C.Teacher. 
D.Doctor.
填空题
as fast as
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