Directions:Read the following three passages carefully. Each passage is followed by some questions or unfinished sentences. For each of them there are four choices marked A, B, C, and D. Choose the best answer to each question.(本题共15小题,每题2分,共30分)Passage1Designed and constructed for the 1889 Exposition Universelle (the World’s Fair), the Eiffel Tower was meant to be a temporary structure, but it skirted demolition talks twice.The first time, at the beginning of the 1900s, the tower was kept around because of its transmission talents. Gustav Eiffel, the chief architect of the Eiffel Tower, had a variety of scientific experiments tested on the tower with the hope that any discoveries would help prolong its lifespan. One of these included a wireless transmissions test, which the tower passed with flying colors. During World War I, the Eiffel Tower’s transmission capabilities enabled it to intercept communications from enemies as well as relay intel to troops on the ground. The second time the Eiffel Tower was almost destroyed was during the German occupation of France during World War II. Hitler planned to get rid of the tower, but never ended up going through with his plan.Today, the Eiffel Tower is still used for communication transmissions but is chiefly regarded for its grandeur. If you can believe it, many Parisians initially found this architectural marvel to be nothing more than an eyesore. Regardless, the Eiffel Tower today stands as one of the most visited tourist attractions in the world. Visitors can walk up to the first floor of the Eiffel Tower ortake the elevator all the way up to the top, where they’ll be treated with vast panoramic views of the city. While some recent visitors complain of long lines –especially during the summer –you can bypass the wait by booking your tickets online at the Eiffel Tower’s website. And though some travelers aren’t crazy about the price to get to the top, many agree that the views are worth it. Visitors also strongly recommend making an additional trek at night. That’s because every hour on the hour, thousands of flickering light bulbs make the Eiffel Tower sparkle, leaving tourists in complete awe.1.For what purpose was the Eiffel Tower built?

A. Sightseeing.
B. An exposition.
C. A meeting.
D. An art show.