问题
选择题
— How wonderfully you are playing the piano! do you practice it a week?
— Twice. Practice makes perfect.
A. How often B. How many times C. How soon
答案
答案：B
题目分析：句意：你弹钢琴弹得真好！你一个星期练习几次？两次。熟能生巧。How often多久一次； How many times 多少次; How soon多久以后。所以选B。