My family and I are going to take a holiday in the USA, Colombia, England, France and Switzerland in three hours. Now we are getting ready for it. Mum and Dad have already __【小題1】__(澆水) the plants. My brother has packed the__【小題2】__(毛巾). They’re in the suitcase, __【小題3】__(在……旁邊) the guidebook. But he hasn’t locked the windows yet. I’ve already surfed the Internet and found out a lot of information about the cultures and customs in these countries. Here is what I’ve learned online. In the USA, just like in China, people are supposed to __【小題4】__(搖動(dòng))hands when they meet for the first time. In England, people should kiss each other when they meet for the first time. In Japan, it’s polite for you to bow when you meet someone for the first time. You’re supposed to use your chopsticks in a __【小題5】__(合適的)way. It’s rude to __【小題6】__(指) at someone with your chopsticks while eating. And you are also supposed to make a noise while eating noodles. It shows you like the food. In France, it’s bad manners to say “I’m __【小題7】__(飽的).”. You should say “It was delicious.” if you don’t want any more food. In Colombia and Switzerland, people have quite different attitudes __【小題8】__(對(duì)于) time. Colombian people are very __【小題9】__(寬松的) about time. It’s OK if you arrive a little late. But Swiss people think being on time is very important. It’s the __【小題10】__(國(guó)土) of watches, after all.

 It's polite for us ________ hello to our teachers when we meet them.

   A. say               B. to say            C. saying             D. says