2. 外语
  3. On a clear night, people can see______ Nowadays even suburbs are becoming unsuitable for astronomers to do their jobs because__

On a clear night, people can see______ Nowadays even suburbs are becoming unsuitable for astronomers to do their jobs because__

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问题 On a clear night, people can see______
Nowadays even suburbs are becoming unsuitable for astronomers to do their jobs because______
选项 A、the night sky there is too dark.
B、the once dark areas are also polluted by lights.
C、these areas are not polluted by chemicals.
D、these areas are less developed.
答案B
解析 根据短文第五段的内容可以得知该题答案。
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