Scientists estimate that plants and animals lived _____ 3.5 billion years ago.

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• 1-Do you have a minute? I've got something to tell you.     -OK,________you make it short.     

  A.now that

  B.if only

  C.so long as

  D.every time

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• 2The weather was bad for some weeks, ______ the progress in the building of the power station slowed down.

  A.in case

  B.so that

  C.in order that

  D.so long as

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• 3_______ we start thinking and believing we can do it, anything is possible.

  A.Since

  B.While

  C.Until

  D.Once

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• 4Why not seize it _____ you've got such a good chance?

  A.now that

  B.that

  C.where

  D.which

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• 5Everyone in the village is very friendly. It doesn't matter ________ you have lived there for a short or a long time.   

  A.why

  B.how

  C.whether

  D.when

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• 6____ her son has passed the driving test makes her very happy.

  A.That

  B.What

  C.Whether

  D.Because

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