Before the first nonstop flight made in 1949, it__＿___ necessary for all planes to land for refueling.

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• 1Helen ________ her keys in the office so she had to wait until her husband ______ home.

  A.has left; comes

  B.left; had come

  C.had left; came

  D.had left; would come

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• 2－What do you think of store shopping in the future? －Personally, I think it will exist along with home shopping but ______.

  A.will never replace

  B.would never replace

  C.will never be replaced

  D.would never be replaced

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• 3Hurry up! The shop ＿＿＿＿ in five minutes.

  A.closes

  B.is closing

  C.has closed

  D.is about to close

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• 4－Oh, it's Julia, I _______ her! －She's just make her hair cut and she is ________a new dress.

  A.don't recognize; having on

  B.didn't recognize; wearing

  C.haven't know; putting on

  D.didn't know; dressing

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• 5---Excuse me. You shouldn't smoke here. Look at the sign “NO SMOKING HERE”. --Sorry, I ________ it just now.

  A.doesn't see

  B.haven't seen

  C.didn't see

  D.hadn't seen

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• 6Tom took out a piece of paper he ___________and started reading in a clear tone.

  A.was preparing

  B.would prepare

  C.have prepared

  D.had prepared

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• 7Since the project has been ______ on well, you must ______ it on until it is completed.

  A.carrying, carry

  B.going, carry

  C.going, go

  D.carrying, go

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• 8---Where's the little elephant? ---It's said it __＿＿_ in the hospital.

  A.was examined

  B.will be examined

  C.is being examined

  D.has been examined

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• 9— What do you think of the bottled water? — I don't like it at all. It is reported that much nutrition, including some minerals, ______ while it is being processed.

  A.are ridded of

  B.are gotten rid of

  C.gets rid of

  D.is ridded of

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• 10Every possible means _＿＿__ to prevent the air pollution, but the sky is still not clear．

  A.is used

  B.are used

  C.has been used

  D.have been used

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