Age, to most British and American people, is one of the things considered not【小题1】 to ask

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 ine（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 e in?” and wait for the answer before entering the office.