第3部分：概括大意与完成句子(第23~30题，每题1分，共8分)

下面的短文后有2项测试任务：(1)第23~26题要求从所给的6个选项中为指定段落每段选择1个小标题;(2)第27~30题要求从所给的6个选项中为每个句子确定一个最佳选项。

Black Holes

23-26: D A F B

A. What are black holes made of?

B. Is there proof that black holes really exist?

C. How were black holes named?

D. How are black holes formed?

E. What are different types of black holes?

F. What happens to the objects around a black hole?

27-30: E D C F

27. Black holes are formed after_.

28. When a large star explodes, the gravity compacts ever piece into_.

29. A newly formed black hole and the star it comes from are of_.

30. Albert Einstein’s theory of relativity helps to prove_.

A. a fraction of an inch

B. the creation of new entities

C. the same amount of mass

D. the tiniest particle

E. an explosion of huge stars

F. the existence of black holes

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