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It's sometimes reported that strange objects have been seen high up in the sky. These unidentified(未确认的) flying objects - UFOs have made a lot of people interested. Some of the reports about them are difficult to believe.Some have been explained in scientific ways, others have never been explained.

　　It is not easy to decide whether a report is true or not. One report of UFOs came from a British plane on its way from New York to London in 1954. The British plane was flying over an island at 19,000 feet when the captain noticed that something was on their left and a little lower than their plane. It's about five miles away.

　　"It was not one object but several," the captain said. "We saw one large and six smaller objects. I sent a radio to report about them and I received the answer that the other planes were coming out to meet us. Before the planes arrived, the smaller objects entered the big objects. The big object then became smaller and moved away fast."

1.Some_____ have been explained in scientific ways.

2. In 1954, a British plane met a UFO when it was flying from_____ to_____.

3. The captain_____ and saw something on the left of their plane.

4. How many objects did the captain see?

5. The big object moved away because_____.

One day an old man is selling (卖) a big elephant. A young man comes to the elephant and begins to look at it slowly. The old man goes up to him and says in his ear, “Don’t say anything about the elephant before I sell it. Then I will give you twenty dollars.”“All right,” says the young man. After the old man sells the elephant, he gives the young man twenty dollars and says, “Now, can you tell me how you found the elephant’s bad ears?”“I didn’t find the bad ears,” says the young man. “Then why are you looking at the elephant slowly?” asked the old man. The young man answers, “Because I have never seen an elephant before, and I want to know what it looks like.”
根据短文选择正确的答案
(　 )11. ________  the elephant.
　　　 A. The young man sells     B. The old man sells
　　　 C. The two men sell        D. The old man buys
(　 )12. The young man is looking at the elephant slowly.
He wants to find out ___________.
　　　 A. which foot of the elephant is bad B. how heavy it is
　　　 C. which ear of the elephant is bad D. what it looks like
(　 )13. The young man   ______________.
　　　 A. knows the elephant has bad ears B. wants to buy the elephant
　　　 C. looks after the elephant D. gets some money from the old man
(　 )14. The young man  ______________.
　　　 A. is not interested in elephants B. knows what an elephant looks like
　　　 C. has seen some elephants before D. has never seen an elephant before
(　 )15. Hearing what the young man said, the old man will probably(很可能)be ____________.
　　　 A. angry （生气）      B. happy     C. dangerous      D. hungry