【正确答案】Topic: Perhaps the biggest change that affects people's lives is the availability of the Internet.
Reason 1: First, the Internet has affected people's lives so much in terms of socializing. Millions of people in China can now connect with each other and link up with new friends around the world.
Reason 2: Another reason the Internet has changed our lives in China so much is more practical. Chinese can discover new business strategies; learn more of other cultures and worldwide events, and gain more voice than ever before.
Conclusion: The Internet has been the biggest change of all in China in the past 20 years.

【答案解析】Alternative Wording(替换表达)
Synonyms (a)affect—influence
(b)Internet—Web
(c)each other—one another
(d)around the world—from all over the world
(e)discover—find
(f)worldwide events—events around the globeg
(g)gain more voice—have more to say