—does it take you to watch TV?—About forty minutes.A. How longB. How muchC. How oftenD. H

问题补充：

—does it take you to watch TV?

—About forty minutes.

A. How long

B. How much

C. How often

D. How many

答案：

(答案→)A. How long

B. How much

C. How often

D. How many

解析：根据答语大约四十分钟，可推断出上句意为看电视花了你多长时间？所以选A 。