23. According to the advertisements, a good teacher should be _______________. (A) sensible (B) creative (C) responsible (D) all of the above

29. According to the passage, which of the following statements is true? (A) A woman is required to bow to a man. (B) On a formal occasion, a bow should be about 30 degrees. (C) When saying good-bye, all parties have to bow to each other for three seconds and once. (D) While bowing, men usually put their hands on both sides with their hands touching.