— Go for a picnic this weekend, OK?
— . I love getting close to nature.→A. Why not?→B. I’m afraid not. →C. I believe not.→D. I don’t think so.
网友回答
→A. Why not?→B. I’m afraid not. →C. I believe not.→D. I don’t think so.
从上下文的关系来看，后者表达的是同意去野炊，所以用why not，表示“为何不呢”的意思。