问题补充：
---David said he could fix my computer, but I really doubt it.
---. He is very good at such sort of thing.
A. Don’t worry
B. Of course
C. A piece of cake
D. Never mind
答案：
A. Don’t worry
B. Of course
(答案→)C. A piece of cake
D. Never mind
解析：情景对话题。“大伟说他会修我的电脑但是我怀疑他的能力。”“小菜一碟，他非常擅于此类事情”A. Don’t worry 别担心 B. Of course当然C. A piece of cake小菜一碟D. Never mind 不要紧根据语境选C
