【简答题】A.Because it gives people a sense of achievement. B.Because most people like doing it every day. C.Because it is neither biochemical nor poisonous. D.Because it increases the heart rate and circulatio...
【单选题】听力原文:(A) People are raising the flags. (B) One person is parking a bicycle. (C) People are walking up the stairs. (D) A couple is sitting by the fountain.