-- __________ do you play basketball?
--Twice a week.
A. How long
B. How many times
C. How often
D. How soon
【答案】C
【解析】句意:——你多久打一次篮球?—— 一周两次。A. How long 多长,主要对一段时间进行提问, B. How many times多少次;,指一共多少次;C. How often 多久,对频率进行提问, D. How soon多久,指将来某个动作发生这段时间提问,常用于一般将来时态中,根据Twice a week.可知是对频率提问;故选C