The universe is really mystical(神秘的). Scientists have done lots of study about it but there is still much they haven’t discovered. ___ think that people have lived on the earth for many many years. However, we haven’t found life on any other planets _____.

There _____ eight planets going around the sun. The earth is one of them. There are humans, animals, plants and many other kinds of _____ on the earth. There is water and air, too. And compared to the other planets, the earth is not too _____ or too cold. None of seven other planets has a(n) _____ like that of the earth.

The sun and its planets are_____the solar system, and our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way. There are billions of_____ in the Galaxy, and our sun is only one of them.

Scientists have also_____many other galaxies in the universe. Their light has to travel for many years to reach us. So how______ is the universe? It is impossible to imagine______.

Scientists have sent spaceships to the planet Mars to take______photos. They have______ sent spaceships to travel outside the solar system. However, no spaceship has travelled far enough to reach other stars in _____ Galaxy.

When we see stars twinkling(閃耀) in the sky at night, we may think a lot:with so many stars in the universe, is there life out there in space? If there is life on other planets, what life will be like there? What transports do they use to travel______? Why don’t they visit us? We do not know the answers...

1.A. Workers B. Doctors C. Scientists D. Managers

2.A. yet B. already C. still D. just

3.A. is B. are C. was D. were

4.A. plant B. life C. animal D. nature

5.A. cool B. warm C. hot D. wet

6.A. lesson B. house C. expression D. environment

7.A. caused B. carried C. explained D. called

8.A. lights B. rivers C. stars D. gods

9.A. discovered B. invented C. produced D. prevented

10.A. large B. far C. wide D. long

11.A. introduce B. overcome C. appear D. imagine

12.A. fetch B. take C. carry D. bring

13.A. pretty B. just C. even D. also

14.A. her B. our C. its D. his

15.A. travel B. serve C. throw D. beat

1.C 2.A 3.B 4.B 5.C 6.D 7.D 8.C 9.A 10.A 11.D 12.B 13.D 14.B 15.A 【解析】本文是一篇說(shuō)明文。主要介紹了宇宙之神秘以及科學(xué)家探索宇宙的各種努力。 1.考查名詞詞義辨析。句意：_________認(rèn)為人們已經(jīng)在地球上居住多年。Workers工人...
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1./s??/__________________

2./??raIv/______________

3./p??sIfIk/______________

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5./?hl?deI/____________

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2.A. dressed B. asked C. passed D. greeted

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