Questions 11-13 are based on the following monologue about American advertising. You now have 15 seconds to read Questions 11-13. What does the speaker think future advertisers should do

单项选择题According to the author, we should reverse our classification of the physical sciences as hard and the social sciences as soft because______.

单项选择题What classes are the man and the woman probably taking

单项选择题What advice was given by Professor Watson7

单项选择题The languages of the so-called undeveloped or uncivilized groups fall behind the Western languages in______.

单项选择题A coronary bypass is an operation______.