单选题 — Doctor, I can't come to see you next Monday.— ______. Come and see me whenever you have time.
【正确答案】 A
【答案解析】[解析] 本题考查情景交际用语。come on和go ahead都有“鼓励对方继续做某事”的意思; not at all表示“不用谢”;只有A意为“不要紧”,可表安慰。