Question

"_________do you play the piano?" "Twice a week. "
A. How far          B. How often          C. How long

Answer 1

B

试题分析：句意: 你多久拉一次小提琴？一周两次。A. How far多远， B. How often 多久一次，C. How long 多长。据句意，这里问的是频率，故选B。