Question

---________ have you played the piano? ---For four years.
A How often   B How long    C How much      D How many

Answer 1

B

本題考查特殊疑問詞。How often多久一次； How long多長時間；How much多少；How many多少。句意：——你彈鋼琴有多長時間了？——4年。