【正确答案】 C

【答案解析】[听力原文] Good afternoon, class, today we are going to discuss the construction of one of the world's most famous tourist attractions. It's located in the middle of Paris, France. It's the Eiffel Tower, designed by Gustave Eiffel and built between 1887 and 1889. The Eiffel Tower today remains the tallest structure in Paris, standing 300 meters high. The iron structure of the tower weighs a total of 7, 300 tons. It took 300 workers to join together 18, 038 pieces of puddle iron with three and a half million metal pins to set up the tower. That doesn't sound like such a big deal by today's standards, but for the time, it was the tallest structure in the world. It held the record for over 40 years. The tower was built to be the gateway into the 1889 World's Fair in Paris. Well, as famous as it is, many members of the French public did not approve of the tower. One famous novelist even ate his lunch at a restaurant near the tower because he felt it was the only place he could eat without having to see it. And furthermore, the City of Paris had an agreement with Gustave Eiffel that after twenty years, rights to the tower would be theirs. Gustave Eiffel had a permit for the tower to stand for 20 years; it was to be demolished in 1909, when its ownership would belong to the City of Paris. The City of Paris had planned to tear it down but as the tower proved valuable for communication purposes, it was allowed to remain after the permit expired. By that time, the tower was so firmly established in French history that they could not tear it down. The military used it to dispatch Parisian taxis to the front line during the First Battle of the Marne. How long did it take to build the Eiffel Tower? 听力原文中提到It's the Eiffel Tower, designed by Gustave Eiffel and built between 1887 and 1889，指出埃菲尔铁塔是在1887年到1889年间建成，因而一共花费了三年的时间，故选C。

【正确答案】 B

【答案解析】[听力原文] For what purpose was the Eiffel Tower built? 听力原文中提到The tower was built to be the gateway into the 1889 World's Fair in Paris，指出建造埃菲尔铁塔是为了将其用作1889巴黎世界博览会的大门，故选B。

【正确答案】 C

【答案解析】[听力原文] Why wasn't the Eiffel Tower torn down as planned? 听力原文中提到The City of Paris had planned to tear it down but as the tower proved valuable for communication purposes, it was allowed to remain after the permit expired. 由此可知巴黎市政府曾经计划将埃菲尔铁塔拆除，但是在到期之后却将其保留了下来，原因是埃菲尔铁塔被证明极具通讯价值，故选C。