3. Does the writer think growing cities affect astronomers work? Why does he think so?
A) Yes. Because the once dark rural areas are polluted by lights.
B) No. Because they can still see stars in rural areas.
C) Yes. Because rural areas are not a good place for astronomers to study stars.
D) No. Because faint light given off by stars can still be seen on a clear night.
4. How does light pollution affect wildlife? Which of the following is NOT correct?
A) Animals may go off course due to the attraction of artificial lights.
B) Animals might be attracted by artificial lights to go into cities.
C) Artificial lights at night may make migrating birds lose their way.
D) Attracted by artificial lights， birds fly into lighted buildings.
5. Which of the following is closest in meaning to the title "Light Night， Dark Stars"?
A) The night sky is light colored and stars are black.
B) Lights appear at night and stars are seen in the dark.
C) City lights illuminate the night sky and make stars invisible.
D) City lights at night illuminate stars in the sky.
答案与题解：
1.C 第一段的第一句提供了答案。在没有云，没有月光，没有人造光源的情况下，可以看见14，000颗星星。
2.D A、B、C所述内容均可在第二段中找到。D所表达的意思不符合原文，因为a layer of haze in the air的意思是“空气中有一层薄雾”。
3.A 答案在第五段中可以找到。随着城市规模的扩大，曾经黑灯瞎火的乡村逐渐变成了市郊，那里的灯火使科学家无法观测到星体发出的微弱光芒。
4.B 第六段最后三句告诉我们人造光源会误导动物而致使它们迷路，但却没有说会将它们引进城市。
5.C 题目的意思是：城市灯火通明的夜晚使星星失去光泽。