Age, to most British and American people, is one of the things considered not 小题1: to ask a stranger or a person that one does not Know well. 小题2:  age, other things such as one’s income（收入）, marriage, and politics are 小题3:  not fit to ask or talk about. There are still other  小题4:   for you to understand the westerners and to  小题5: on well with them. If you want to  小题6:   one’s bedroom, you have to ask for permission at first, and you must not open the desk or the closet in that  小题7:  . On the top of the desk, there may  小题8:   letters, business papers or other things. You must not  小题9:   up one of these and read it. It is the  小题10:   as in an office. If it is somebody else’s office, always ask, “May I come in?” and wait for the answer before entering the office.