阅读下面短文,根据所给中文正确拼写单词，使短文意思完整。每空限填一词。(10分)

Before you go to another country, it is a great  1.(帮助)if you know the language and some of the customs of the country. When people 2.(见面)each other for the first time in Britain, they3.(说)“How do you do.”and shake hands. Usually they do not shake hands 4.(在…以后)they haven’t met for a long time. Last year a group of German 5.(学生)went to England for a holiday. Their teacher told 6.(他们)that the English people hardly shake hands. So when they met their English friends at the station, they kept their hands behind their7.(背).The English students had learned that Germans shake hands as often as 8.(可能),so they put their hands in front and got 9.(准备)to shake hands with them. It made both of them 10.(笑).

The Bermuda Triangle(百慕大三角)is in the Atlantic Ocean, near Florida in the USA. During the past 60 years, more than 1,000 seamen in ships and pilots in planes have lost their lives. It is known as “The Triangle of Death”for its strange seawater and sudden storms. What’s the strangest is the light of the seawater, which looks so bright that it can be seen even from an outer spaceship.
　　At 2:00p.m. on Dec. 5, 1945, five planes took off in fine weather from the airport of Florida, on a training task. Two hours later, the leader in the sky radioed that he was “completely lost”. Then there was silence. Another plane was sent to look for them and also disappeared.
　　One of the largest ship that had disappeared in the triangle was an American coal ship, 500meters long. The weather was good, and there were no messages for help before it was “gone”. No broken ships or dead bodies have been found so far.
　　No one is able to tell how all these accidents have happened. A group of Japanese scientists were there to see what it was really like in 1995, but nothing has been heard of them ever since.
【小题1】 What is the passage mainly about?