Over the past decades,sea ice___________in the Arctic as a result of global warming.                 

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• 1— I wonder if you could go with me to the supermarket. — Don't disturb me. I _______ my experiment report all the morning and haven't finished yet.

  A.write

  B.was writing

  C.have written

  D.have been writing

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• 2An average of 130,000 Chinese       aboard for studies every year over the past few years, improvingexchanges in the educational fields.

  A.was going

  B.have been going

  C.has been going

  D.are going

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• 3—Waiter,  what about my food?I________for over 30  minutes.—Oh,  sorry,  sir.Just one more minute,  please.

  A.have waited

  B.was waiting

  C.have been waiting

  D.had waited

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• 4________ in a space suit in the base, the young man looks more like an astronaut I've been ________.

  A.Dressed; admiring

  B.Dressed; admired

  C.Wearing; admiring

  D.Worn; admired

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• 5-You don't have to play that record so loud,do you?-I'm sorry. __ you?

  A.Has it been bothering

  B.Did it bother

  C.Will it bother

  D.Had it bothered

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