---Do you think I could borrow your English-Chinese dictionary?---.A. Yes you couldB. Yes

问题补充：

---Do you think I could borrow your English-Chinese dictionary?

---.

A. Yes, you could

B. Yes, you may borrow

C. Yes, help yourself

D. Yes, go on

答案：

A. Yes, you could

B. Yes, you may borrow

(答案→)C. Yes, help yourself

D. Yes, go on

解析：本题的含义是你认为我可以借你的英汉字典吗？根据语境意思较符合的是可以，请自便，help oneself表示此意，故本题选C。