．— have you been a reporter?—For more than three years．A. How longB. How manyC. How soonD.

问题补充：

．— have you been a reporter?

—For more than three years．

A. How long

B. How many

C. How soon

D. How often

答案：

(答案→)A. How long

B. How many

C. How soon

D. How often

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