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Russia（俄罗斯） is a big country. It has many special （特别的）customs （习俗）. So if you travel there, you must k1． about the customs there. 

Russian people like number one and seven. They think the t2． numbers can bring them good luck . But they don't like number thirteen or F3．. So there is no Room 13 in hotel（旅馆）and they never h4． important activities on Friday or thirteenth. 

People in many European（欧洲的）countries don't like cat, b5． Russian people do. If someone wants to move into a new house, the first that comes into the house must be a c6．. They think the cat can take b7． luck away from the room. But they don't like black cats. I8． someone meets a black cat in the morning, he or she will have a bad day. 

Another interesting custom is about is c9．. Russian people don't like yellow. They never w10． yellow clothes in public(在公共场合) or give yellow gifts to their friends. But they like yellow sunflowers. Sunflower is the national flower of Russia.