解析：选D　细节理解题。根据第三段的"Listed are 754 sites all over the world, of which 29 are in China - the third most after Spain and Italy."可知D项正确。

　　2．What can you expect to learn at the class?

　　A．What world heritage is.

　　B．Why we should protect heritage.

　　C．How world heritage should be protected.

　　D．All of the above.

　　解析：选D　细节理解题。根据第三段的"The class aims to tell children what world heritage is and why and how it should be protected."可知课堂设置的目的是告诉孩子们世界遗产是什么，为什么要保护遗产以及如何保护遗产，故选D项。

　　3．The underlined word "cultivate" in the third paragraph probably means "________"．

　　A．distribute　　　　　　 　B．exploit

　　C．develop D．improvise

　　解析：选C　词义猜测题。根据下文这种课程能帮助孩子意识到保护遗产的重要性可知，此处指的是教育无疑是最好的培养孩子遗产保护意识的最好的方式，故选C项。

　　4．What's the purpose of the passage?

　　A．To inform us of the reason for protecting the heritage.

　　B．To tell us the way to protect the heritage.

　　C．To tell us a new course.

　　D．To tell us heritage preservation starts with education.

　　解析：选D　写作意图题。本文主要介绍了在教学中加入遗产保护的课程，写作的目的是告诉我们遗产保护从教育开始，故选D项。

　　B

　　Where can you find the first successful airplane, one of the world's biggest bugs (虫子) and Kermit the Frog? They're all at the Smithsonian Institution, American's storehouse of the coolest things ever, in Washington, D．C.More than 138 million objects have been collected by their 19 museums, with more coming in every day.

　　The Smithsonian was founded in 1846 and named after James Smithson, an English businessman.Smithson never visited America, but he left his entire fortune to the United States to build an institution "for the increase of knowledge."

　　Here are just a few of the amazing things in the Smithsonian collection.

　　Big bugs

The Smithsonian has 35 million bugs.The largest insect in the collection is a beetle (甲虫) from South America called the titan beetle.Titan beetles can grow to more than 6 inches long.