A、  B、  C、  A因为问的是同事的发言怎么样，所以回答的时候应该用好或不好进行评价才对。(B)是陷阱，想通过重复使用week引起混淆。(C)是因为在回答以疑问词开头的句子时，使用了Yes，所以也是错误答案。

Does this copy machine work?
(A)Yes, it makes great coffee.
(B)He only works on weekends.
(C)I think it still needs to be fixed.

How did you like Carol’s presentation last week?
(A)It was very informative.
(B)Next week is better, in fact.
(C)Yes, I do like presenting.