题目内容：

Over one billion people used Facebook last Monday. For the ______ time, the site had so many ______ in one day. The CEO(首席执行官) of Facebook, Mark Zuckerberg, said it was a great ______ for them. Zuckerberg himself posted on his own Facebook that, “We just passed an important milestone(里程碑). This time one billion people used Facebook in a ______．” He said that on Monday, “One in seven people on Earth used Facebook to talk______ their friends and family.” He added that, “This was the first time we reached the milestone, and it's just the ______ of connecting the world.” Mr.Zuckerberg also said, “A connected world brings ______ relationships with those you love than before.” Zuckerberg ______ Facebook ______ he was a student at Harvard University in 2004. The website ______ became one of the biggest sites in the world. Today, it has nearly 1.5 billion users and Zuckerberg thinks that the ______ will become bigger in the future. In October 2012, he announced(宣布) that the Facebook had one billion visitors who used this website at least once a month. The company needs to ______ a lot in countries where Facebook isn't so ______， such as in many African and Asian ______ and some in Central and South America. Facebook has made Zuckerberg the ninth ______ person in the world, at the age of 31.

1.A. first    B. second    C. third    D. fourth

2.A. performers    B. doctors    C. visitors    D. programmers

3.A. festival    B. success    C. holiday    D. opening

4.A. day    B. night    C. week    D. year

5.A. about    B. with    C. at    D. of

6.A. ending    B. finishing    C. beginning    D. holding

7.A. colder    B. worse    C. shorter    D. stronger

8.A. improved    B. caught    C. made    D. accepted

9.A. because    B. before    C. if    D. when

10.A. quickly    B. finally    C. clearly    D. loudly

11.A. name    B. number    C. address    D. news

12.A. lose    B. grow    C. touch    D. go

13.A. popular    B. available    C. friendly    D. educational

14.A. villages    B. cities    C. schools    D. countries

15.A. tallest    B. richest    C. funniest    D. biggest