From the passage we know a black hole is __________.

试卷相关题目

• 1How many key ways can help you when this kind of event happens、

  A.Three.

  B.Four.

  C.Five.

  D.Six.

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• 2You have to fight

  A.when you see the shooter

  B.if evacuation is impossible

  C.only if your life is in danger

  D.when you are with your friends

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• 3When you find a place to hide, you should_______________.

  A.call 110

  B.silence your cell phones

  C.fight with the shooter

  D.leave your things behind

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• 4The first thing is to__________in the middle of an active shooter event.

  A.RUN

  B.HIDE

  C.FIGHT

  D.SHOUT

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• 5If two adults and two children go to visit the MUSEUM, at least they will pay          .

  A.$5

  B.$2.5

  C.$12

  D.$15

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• 6When a star__________  .

  A.turn into a ball

  B.suck in everything

  C.get smaller and smaller

  D.become darker and darker

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• 7The passage is mainly about __________.

  A.how stars burn out

  B.what dead stars are

  C.how we can see more stars

  D.why stars give heat and light

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