_______ is more important is _______ as the earth cooled down, water began to appear on its surface.

试卷相关题目

• 1The relatives of the passengers in the missing Flight MH370 can't hide their feelings, _____ they can make sure that the plane will make a safe landing on the airport.

  A.except when

  B.except

  C.except that

  D.except where

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• 2Suddenly the idea came to me _______ I might turn to my teacher for help.

  A.what

  B.that

  C.which

  D.whom

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• 3____ I'm mistaken, I've seen that tall man at a party before.

  A.If

  B.As

  C.Unless

  D.When

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• 4________you never plan to visit the polar bears in the North Pole or the penguins in the South Pole，now it is the proper time to start thinking about that.

  A.Until

  B.Unless

  C.As long as

  D.Even if

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• 5 We had just covered half the journey________the engine failed and we could do nothing but wait for help.

  A.before

  B.since

  C.when　

  D.until

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• 6As a green hand, he doesn't know______ it takes to start a business here.

  A.when

  B.how

  C.what

  D.which

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• 7______ I always felt I would pass the exam, I never thought I would get an

  A.A.While

  B.Unless

  C.If

  D.Until

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• 8______ I admit that there are quite a few problems, I don't agree that they cannot be solved.

  A.Supposing

  B.Since

  C.While

  D.As

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• 9Many restaurant menus include the origins of adish, ____ it is prepared, what the main ingredients are, and which farms the ingredients come from.

  A.when

  B.how

  C.what

  D.which

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• 10—Mom, can I go out and play with my friends now? —No, honey, you can't _____ you haven't recovered from the knee injury.

  A.until

  B.before

  C.as

  D.unless

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