Question

5.—I'd like to complain about these dog biscuits. When J opened the box,I found they had gone bad.

 —

A.I don't think you are right.

B.What’s the matter with you?

C.Oh,I'm sorry about that.

D.Really? That’s great!

Answer 1

5. C由“我想投诉这些狗食饼干。当我打开盒子的时候，我发 现它们已经变质”可推知此处是对他人投诉的应答，表示对 某事感到遗憾，用I'm sorry about that。