新课程能力培养九年级英语人教版
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（
B
）12. What is the purpose of the passage?
A. To tell us how to save money.
B. To introduce what the sharing economy is.
C. To encourage us to share with other people.
D. To explain how modern technology makes our life easier.
答案：B
解析：文章主要介绍了共享经济的定义、发展现状、带来的影响及人们对它的疑问等，目的是介绍共享经济是什么。A、C、D项均不是文章主要目的。故答案为B.
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（
D
）13. According to scientists, can't have an influence on whether a person is shy or not.
A. genes
B. life experiences
C. environment
D. hobbies
答案：D
解析：根据第二段“Scientists say genes（基因）, life experiences, and environment can influence whether a person is shy or not.”可知，基因、生活经历和环境会影响一个人是否害羞，hobbies（爱好）未提及。故答案为D.
