As everyone knows, there are many 　16　 of transportation in the world, like bicycles, buses, ships, trains and 　17　 .
If you are in big  18　like Shanghai or Beijing, maybe you get to school   19  a subway or you have to 　20　 to school because you live in a mountain village. Here I am just trying to say something about　21　 .
Ten years　22　, bicycles were very　23　in most villages.  24　 family had one or two of bicycles. Children got to school by bicycle; 　25　 rode bicycles to go shopping. Then motorcycles (摩托车)   26  to become popular. People no longer rode bicycles because motorcycles ran   27  faster.  But now, in some countries，bicycles are highly suggested
  28  the main means of transportation. They think buses, cars and motorcycles pollute(污染) the air but bicycles   29  . So, to live a low-carbon life,   30  a bike is a good way.

Do you know how to write an English letter and envelope?
When we write a letter in Chinese, we always put the date at the end of the letter. But it is different in English. We have to put it on the top of the right corner. And above the date, we also write the number of our house and the names of our street, city and country. To begin the letter, we always use the word like "Dear sir",　 "Dear Mr./Miss./Ms.…". To end the letter, we usually use words like "Yours”, “Yours ever" or "Truly yours".
Now read the following envelope, please.
【小题1】"We have to put it on the top of the right corner." The word "it" here means_____.
A. the date　　　　　　B. the letter　　　　 C. the passage
【小题2】To what country will the letter be sent?
A. P.R. China　　　　　B. China　　　　　 C. The United States
【小题3】Who writes this letter?
A. Miss Susan Brown　　B. Zhang  Hua　　　C. You
【小题4】From the passage, we know when we write an English letter, we should
put down our address _____.
A. at the end of the letter on the right
B. at the end of the letter on the left
C. at the top of the letter on the left
【小题5】How do you begin your letter if you write to John Smith?
A. John Smith　　　 B. Mr. John　　 　C. Dear Mr. Smith