【单选题】

Different Customs and Cultures 

If an American is satisfied with you, he will put his thumb and forefinger into a circle. That means OK. But in Brazil, the very sign is considered to be rude. In Poland, a guest usually presents flowers to his hostess. The number must be an odd(奇数) one. Besides, the hostess isn’t expected to remove the cover of the bunch of flowers. And usually, red rose is a sign of love. 
Usually we nod to express our agreement and shake our heads to show disapproval. To our heads to show disapproval. To our surprise these body movements mean the opposite in Bulgaria.(保加利亚) 
The differences in customs and cultures in the world are really noticeable. We should learn more about them to avoid them to avoid embarrassment(窘迫). Then, would you please remember: When in Rome, do as the Romans do.   
46. In Poland, if a man gives some odd red roses to woman as a present, it means that he _____.  
A. will invite her to a dinner party　　 B. has not been in love with her 
C. will invite her to a ball　　　　  D. has fallen in love with her   
47. If a Brazilian puts his thumb and index(食指) into a circle, it shows that he _____ you.  
A. will be friends with　　　　  B. is not satisfied with 
C. is willing to help　　　　　　D. is satisfied with  
48. In Poland, it is _____ for the hostess to remove the cover of the bunch of flower somebody presented to her. 
A. impolite　　B. Polite　　　　C. expected　　 D. unexpected 
49. In Bulgaria, if a man nods, it means that he _______ with you.  
A. will have a talk　　B. disagrees 　　C. will shake hands　　D. agrees  
50. The sentence “When in Rome, do as the Romans do” means that _______.  
A. we should learn from the Romans　　B. we should work as the Romans do 
C. we should obey its customs when we are entering a country.　　D. we have been Romans