---How often do you surf the Internet?---.A. Last weekB. Once a weekC. In a weekD. One wee

问题补充：

---How often do you surf the Internet?

---.

A. Last week

B. Once a week

C. In a week

D. One week

答案：

A. Last week

(答案→)B. Once a week

C. In a week

D. One week

解析： 考察对频率的回答。A 上周B一周一次C在一周内D一个星期句意：你多久上一次网？

只有B 的意思符合，故选B