It's only six o'clock now; Little Tom should be up ,though, because he _____ for nine hours.

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• 1I should say sorry to you but I ____trouble. 

  A.did not mean causing

  B.did not mean to cause

  C.meant causing

  D.meant to cause

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• 2Linda ，make sure the tables ______ before the guests arrive.

  A.be set

  B.set

  C.are set

  D.are setting

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• 3Hurry up; it is required that we ______ at six.

  A.will arrive

  B.arrived

  C.arrive

  D.would arrive

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• 4It was reported that an agreement ________ between the two companies and that they would carry out a project together.

  A.reached

  B.had been reached

  C.was reached

  D.had reached

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• 5--Hello, Kate. How is your weekend at home? --Awful! You know it is the first time I ____ alone at home, bored to death.

  A.has left

  B.had left

  C.had been left

  D.have been left

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• 6Many British people have noticed that butterflies _______ from its natural habitats during the past several years.

  A.are disappearing

  B.have been disappeared

  C.have been disappearing

  D.will have disappeared

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• 7With the help of high technology, many new substances（物质）______in the past years.

  A.discovered

  B.have discovered

  C.had been discovered

  D.have been discovered

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• 8—Jane, have you finished your paper?   —No, I ____ my sister with her homework all the morning.

  A.help

  B.have been helping

  C.helped

  D.was helping

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• 9---Do you like the new pen? ---Yes, it_____ smoothly.  

  A.is written

  B.is writing

  C.writes

  D.wrote

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• 10--We ______ that you would fix the TV set for us. --I'm sorry, but I was too busy, so I ________.

  A.had expected; had fixed it

  B.expected; fixed it

  C.had expected; had it fixed

  D.expect; fix it

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