The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane______ normally.

试卷相关题目

• 1'The moment _____soon,' he thought to himself, waiting nervously.

  A.came

  B.has tome

  C.was coming

  D.is coming

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• 2— Have you got any information about your missing dog from the police? — No. I ______. The police say they'll let me know when there is any news.

  A.waited

  B.was waiting

  C.have waited

  D.am waiting

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• 3—Did you have a good time meeting your old friends yesterday? —Yes, I did. I _______ them since we graduated from college.

  A.didn't see

  B.hadn't seen

  C.haven't seen

  D.wouldn't see

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• 4--Look! Somebody ________the sof

  A.--Well, it wasn't me. I didn't do it.A.is cleaning

  B.was cleaning

  C.has cleaned

  D.had cleaned

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• 5—Why do you look so worried?  —My computer broke down and my essay ______ unfinished since.

  A.had left

  B.has left

  C.was left

  D.has been left

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• 6--- Tony, you must have noticed the student who broke the glass． --- I'm sorry．I __________ attentively．

  A.studied

  B.was studying

  C.am studying

  D.would study

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• 7Principal White has been working in the school for about 20 years, ______  all his energy to teaching and researching as well as the running of a healthy school．

  A.devoted

  B.devoting

  C.to devote

  D.and devote

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• 8--Why is the librarian looking so hard at me? --You ______ to read aloud in the reading room.

  A.don't suppose

  B.haven't supposed

  C.are not supposed

  D.are not supposing

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• 9--Could you tell me where you're working now, Tony? --In the new development zone. But I ________ in a computer company for five years.

  A.have worked

  B.had worked

  C.was working

  D.worked[

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• 10By the time he realizes he ______ into a trap, it'll be too late for him to do anything about it.

  A.walks　　

  B.walked

  C.has walked

  D.had walked

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