Question

— ________ have you learned to play the piano?
— ________ five years ago.

A．How long, For	B．How often, For
C．How long, Since	D．How soon, Since

Answer 1

C

试题分析：句意：你学习弹钢琴多长时间了？自从五年前就开始学了。How long指的是“多长时间”；how often指“多长时间一次”；how soon指“多久之后”。答语中有ago，因此不能使用for，因此本题选C。