语篇理解
The last part of this century will be an age of exploration（探险）such as man has never known．There are 9 planets, at least 30 moons, and thousands of asteroids（⼩⾏星）．Their total area is about 250 times that of the earth．Spaceships will not be able to land on some of them．But that still leaves to be explored an area 10 times as great as the continents of the earth．宋书
插形近字 Exploring space may em terrifying to some people．No doubt （毫⽆疑问）explorers of the past were terrified by the empty oceans that lay before them．They conquered（征服）their fears, crosd the oceans, and built the New World．
In the past when explorers t sail into the unknown, they had to say good-bye to everything they knew at home．Space explorers will not face such great loneliness．Even when they travel far beyond the sun, they will be able to nd messages back．
1．According to the first paragraph, ______．
[ ] A．man has not known how to explore space yet
B．spaceships will be able to reach some places in space
包拯墓
双子座的爱情
C．an area to be explored if as large as the continents of the earth
D．the total area to be explored if about 250 times that of the earth
2．Future exploration will ______．
[ ] A．be more difficult than it was in the past
B．cover a larger area than any exploring done before
C．be more dangerous than in the past
D．be more lonely than in the past
3．If the land area of the earth is about 55×106 square miles , the
面积在线计算器area that can be explored in space is probably ______ square miles.
A．495×106 B．165×107
C．55×107 D．1375×107
4．Now space explorers will not feel lonely becau ______ .
桃花工业园>整合营销理论A．they are so excited that they forget everything at home
B．they have already said good-bye to everybody they know
C．they have been able to conquer fears and loneliness
D．they keep in touch with the earth at any time
5．The writer thinks that all the areas that can be explored are to be explored ______ .小孩子气
A．at the end of the nineteenth century
B．at the end of the next century
C．at the end of the twentieth century
D．in the far-distant future
答案：B;B;C;D;C
