网址：http://m.1010jiajiao.com/timu3_id_2369961[举报]
－________ do you go to the cinema?
－Once a month．
A．How long
B．How far
C．How often
D．How much
“________ do you go to the cinema?”
“－About once a month．”
B．How often
C．How soon
D．When