All substances, _______ solids, liquids, or gases, are made up of entirely atoms.

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• 1What a pity! ________joined in the party, I would have met my old friend．

  A.lf I have

  B.Had I

  C.I had

  D.Have I

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• 2Two hours away from the tall buildings of New York ________．

  A.some of the world's largest bears live

  B.lives some of the world's largest bears

  C.do some of the world's largest bears live

  D.live some of the world's largest bears

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• 3Though _____ of the danger, he still went skating on the thin ice.

  A.warning

  B.to warn

  C.warn

  D.warned

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• 4 No sooner _____ themselves in their seats in the theatre _______ the curtain went up.

  A.they have settled; before

  B.had they settled; than

  C.have they settled; when

  D.they had settled;than

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• 5On the table _____ two dictionaries．You may look up the word in either of them．

  A.lie

  B.lays

  C.laid

  D.lies

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• 6Not until the next morning _____ how serious the situation was．

  A.did she realise

  B.had she realised

  C.she realised

  D.she had realized

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• 7Not a single mistake _______ in the last test

  A.she made

  B.made she

  C.did she make

  D.she did make

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• 8 Then _______ we had been looking forward to.

  A.came the hour

  B.the hour came

  C.comes the hour

  D.the hour is coming

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• 9_______, the disease diphtheria would produce a powerful poison that would kill the patient.

  A.If untreated

  B.If it untreated

  C.To be untreated

  D.If being untreated

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• 10Only by reading more books ________ improve your reading skills

  A.you can

  B.can you

  C.do you

  D.you do

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