题目内容

Questions 18--21 are based on the following passage. What is the percentage of American adult women who smoke regularly

A. Forty-three.
B. Thirty-one.
C. Seventy-five.
D. Forty-six.

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A. The crust.
B. The ground.
C. The plate.
D. The boundary.

A. 对
B. 错

A. Income, years of schooling and job type.
B. Income and work environment.
C. Education and mood.
D. Occupation and influence of family members.

A. On a bus.
B. In an office.
C. On a ship.
D. On a plan