网址：http://m.1010jiajiao.com/timu_id_848987[举报]
A: How often do you surf the Internet?
B:_________ ．
A．Twice a week． B．Two weeks a time C．A week twice．
_____ do you surf the Internet?
Twice a week．
A．How often
B．How long
C．How soon
D．How many