单选题 —If you are free tonight, I'd like to invite you to a movie.
—That's nice of you, but are you ?

【正确答案】 C
【答案解析】[解析]本句句意为：如果你今晚有空的话，我想请你看电影。很感谢你，但是你是认真的吗?由此可知本题答案应为C。