-- does she chat with friends on the Internet?--Once a week.A. How longB. How muchC. How m

问题补充：

-- does she chat with friends on the Internet?

--Once a week.

A. How long

B. How much

C. How many times

D. How often

答案：

A. How long

B. How much

C. How many times

(答案→)D. How often

解析：考查词义辨析。How long 多久，How much 多少，How many times 多少次，How often 多久一次，表示频率，once a week表示频率，故用how often来提问。