A、  B、  C、  B(A)适合用来回答由how often引导的疑问句。(B)针对是否去听音乐会的提问，回答已经买票了，即同意去听音乐会，故为正确答案。(C)重复使用问题中出现的going，易造成误导。

Where did Mr. Cox leave the fabric samples?
(A)Tomorrow morning.
(B)It’s really soft.
(C)He gave them to me.

What do you think about going to the concert on Wednesday?
(A)Not very often.
(B)I’ve already bought two tickets.
(C)They’re both going.