. If a computer crashes, you will lose the file you _________unless you save it regularly.

试卷相关题目

• 1—Have you seen your aunt lately? —Yes, in fact I saw her yesterday．I_________ her for several months．

  A.haven't seen

  B.didn't see

  C.hadn't seen

  D.don't see

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• 2. BRT ______ improve a city's public transport and it is a symbol of the city's progress as well.

  A.is meant to

  B.means to

  C.means

  D.is meant for

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• 3______Oh, much smoke here ! Somebody _____ the window, please.

  A.opens

  B.open

  C.shall open

  D.will open

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• 4. ----Is there anything wrong, Bob? You look sad. ----Oh, nothing much. In fact, I ________ of my friends back home.

  A.have just thought

  B.was just thinking

  C.would just think

  D.will just be thinking

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• 5It's really time I should go home, but I'm enjoying myself, so I ______ here a bit longer.

  A.am staying

  B.have stayed

  C.stayed

  D.stay

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• 6Because of the Russian gas limit to Europe, attempts _________ to use botanical fuel as a source of power.

  A.have made

  B.having made

  C.are being made

  D.will be making

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• 7In his letter, he said it was the third time that he ______ Zhuhai.

  A.had visited

  B.visited

  C.has visited

  D.would visit

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• 8Something _______ wrong with the machine, and it _______ not work.

  A.being; could

  B.going; should

  C.were; might

  D.went; would

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• 9Large quantities of fish _______ in the river in the past few days.

  A.were caught

  B.was caught

  C.has been caught

  D.have been caught

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• 10. Many wild animals in the world _______ , so we must take measures to protect them.

  A.are dying out

  B.have died out

  C.died out

  D.die out

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