-- have you been at this factory? Since 2000.A. How longB. How muchC. How oftenD. How

问题补充：

-- have you been at this factory?

-- Since 2000.

A. How long

B. How much

C. How often

D. How soon

答案：

(答案→)A. How long

B. How much

C. How often

D. How soon

解析：本题考查特殊疑问词。How long多长时间；How much多少；How often对频率提问；How soon多久。句意：----你在那家工厂已经呆了多久？----自2000年以来。