________ the earth cooled down, water began to appear on its surface．

试卷相关题目

• 1You may keep this book for a month, _________ you don't have it lost．

  A.as well as

  B.as well

  C.as long as

  D.as far as

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• 2She likes Tom best ________ all the boys he is the most honest．

  A.because

  B.because of

  C.since

  D.for

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• 3If it ________ tomorrow, I won't go out seeing．

  A.rains

  B.will rain

  C.is going to rain

  D.is raining

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• 4Take ________much you want and ________ you want to．

  A.however; when

  B.whenever; how

  C.however; whoever

  D.however; whenever

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• 5If the rain ________, we'll have to change tonight's plan．

  A.goes

  B.stays

  C.continues

  D.keeps

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• 6Once you ________ to him, you will know he is a humorous person．

  A.talk

  B.talking

  C.will talk

  D.talks

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• 7________ the weather is like, my sister ________ in the gym every day．

  A.Whatever; works out

  B.However; works out

  C.Whatever; works at

  D.However; works at

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• 8He made a promise ________ I was in trouble, he would help me out．

  A.when

  B.whenever

  C.which

  D.that whenever

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• 9________ you were very busy then, you ________ a telephone to me while you were in town．

  A.If; write

  B.Even though; should have written

  C.If; make

  D.Even though; should have made

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• 10The horse, though _________ native to Europe, was brought to the North American continent by Spaniards．

  A./

  B.was

  C.be

  D.were

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