阅读下面短文，根据上下文意义和所给单词首字母，写出标有题号每小题空白处适当单词的完全、正确形式。(每空一词)
Tibet is among the most popular places for Chinese tourists．The number of travelers to Tibet has g1 by 10 percent every year for a few years．What is the best w2 to go to Tibet for tourist trip，by plane，by bus or by train? People who want to go to Tibet always ask this question．
If you take the plane，you won’t see the b3 places on the way．If you take the bus，you will be very t4 after the trip．If you take the train，you can enjoy the scenery a5 the way and sleep quite well．Now，since July 1st，when the first train r6 1，956 kilometers from Xining to Lhasa，more and more P 7 have been going to Tibet．
The train stops at several f8 places along the way，such as Qinghai Lake，Kunlun Mountain，and the Potala Palace．Passengers can also enjoy many activities d9 the journey，like Tibetan dancing and Karaoke．On the train，passengers can have tea，eggs and noodles for b10 ，and fried g11 vegetables and chicken for lunch，Unlike most Chinese trains which have open—hole toilets，this one has special toilets which call c12 the waste．There is also a special garbage system(系统) in the train that k13 the environment clean．
All the windows on the train can protect people from the b14 sunlight．Other equipment，such as televisions，and electrical sockets(插座) for computers and cell—phones，Can a15 be found on the train．
Because there isn’t much oxygen(氧气)there，trains will have oxygen masks for t 16 who need them．It makes passengers feel m 17 comfortable when they have e18 oxygen on the famous“roof of the world”．There are also doctors on the train to make s19 that all of the travelers are safe．“I feel very comfortable，”said Yue Jiang，a Beijing-born s20 who has lived in the United States for 20 years．“It certainly meets Western standards and it’s very clean．”
1．grown 2．way 3．beautiful 4．tired 5．Along
6．ran 7．people 8．famous 9．during 10．breakfast
11．green 12．collect 13．keeps 14．bright 15．also
16．those 17．more 18．enough 19．Sure 20．scientist