Over the past decades, sea ice _____ in the Arctic as a result of global warming.

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• 1I called Hannah many times yesterday evening，but I couldn't get through. Her brother_____ on the phone all the time!

  A.was talking

  B.has been talking

  C.has talked

  D.talked

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• 2-- How are you planning to travel to Shanghai? 　--- I ______ yet, but I ______ taking a train.

  A.didn't decide; am considering

  B.haven't decided; consider

  C.haven't decided; am considering

  D.hadn't decided; have considered

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• 3-Can we meet tomorrow afternoon? —Not in the afternoon ,I'm afraid. I____________.

  A.will be working

  B.am going to work

  C.am about to work

  D.will work

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• 4　　------Your phone number again ? I ______ quite catch it . 　　------ It's 9568442.

  A.didn't

  B.couldn't

  C.don't

  D.can't

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• 5When I called you this morning,nobody answered the phone.Where ______?

  A.did you go

  B.have you gone

  C.were you

  D.had you been

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• 6Professor James will give up a lecture on the Western culture,but when and where _______ yet.

  A.hasn't been decided

  B.haven't decided

  C.isn't being decided

  D.aren't decided

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• 7They became friends again that day.Until then,they_____to each other for nearly two years.

  A.didn't speak

  B.hadn't spoken

  C.haven't spoken

  D.haven't been speaking

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• 8--Has the train arrived yet?---No, it ought to ___ twenty minutes ago.

  A.arrive

  B.have arrived

  C.be arriving

  D.be arrive

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• 9　　I don't think Jim saw me ; he ______ into space .

  A.just stared

  B.was just staring

  C.has just stared

  D.had just stared

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• 10As time went on, Lucy began to wonder if John ___ their date.

  A.has forgotten

  B.had forgotten

  C.would forget

  D.would have forgotten

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