C．Some people are interested in UFOs.

　　D．You can’t believe all the accounts about UFOs.

　　17．A UFO was seen one night________.

　　A．while they were looking at the light

　　B．when they were walking across a yard to the room

　　C．when Burdens noticed the moon appearing strange

　　D．while they were having dinner

　　18．The UFO looked like________.

　　A．a large plate

　　B．smoke

　　C．light

　　D．a jumping object

　　19．The UFO was seen________.

　　A．by Burdens and his friend

　　B．brighter in the darkness

　　C．to have a yellow bottom and a red top in the same way

　　D．by several people

　　Ⅲ.任务型阅读

　　请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个最恰当的单词。

　　注意：每个空格只填1个单词。

　　For centuries people dreamed of going into space.This dream began to seem possible when high-flying rockets were built in the early 1900s.

　　In 1903, a Russian teacher named Konstantin Tsiolkovsky figured out how to use rockets for space travel.His plan was the first one in rocket science to use correct scientific calculation.About 30 years later，a US scientist named Robert Goddard built the first rockets that could reach high altitudes.During World War II，German scientists built large rockets that could travel very far and carry dangerous explosives.After the war，scientists from Germany went to the United States and the Soviet Union to help those countries build space rockets.

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