---Could I use your dictionary to look up some new words ?
---OK, .
A. that’s all right
B. that’s right
C. it’s a pleasure
D. help yourself
网友回答
A. that’s all right
B. that’s right
C. it’s a pleasure
(答案→)D. help yourself
解析：本题是情景对话题目，help oneself 表示的是“请自便”的意思，符合上下文连贯。