______ the beginning of the 19th century did scientists know that all matter is made up of atoms.

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• 1They believed, and _______ did we, that these modern paintings collected in the Shanghai Art Gallery were as valuable as those in the Museum.

  A.that

  B.which

  C.neither

  D.so

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• 2.We waited and waited._________ we had been looking forward to.

  A.Then came the hour

  B.Then did the hour come

  C.The hour came

  D.The hour then came

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• 3______ it ______ for your help, I couldn't have made any progress.

  A.Had; not been

  B.Should; not been

  C.Did; not been

  D.Not; been

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• 4. Have you got a free evening next week? _______, let's have dinner.

  A.While so

  B.Since so

  C.When so

  D.If so

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• 5---My brother never reads in dim light.--_________.

  A.Nor do I

  B.Neither don't I

  C.So don't I

  D.Neither I do

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• 6Not until some students failed in the exam _____ how much time they had wasted.

  A.didn't they realize

  B.did they realize

  C.they didn't realize

  D.they realize

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• 7Never _____ forget the days when _____ together with you.

  A.shall I...I lived

  B.shall I...did I live

  C.I shall...I lived

  D.I shall...did I live

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• 8______, he still cannot make himself understood.

  A.So clearly he speaks English

  B.So clearly does he speak English

  C.Clearly as he speaks English

  D.As he speaks English clearly

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• 9We laugh at jokes，but seldom _________ about how they work．

  A.we think

  B.think we

  C.we do think

  D.do we think

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• 10  -- ________. --- Yes. Two minutes earlier, we could have caught the bus.

  A.Miss

  B.Missed it

  C.Missing it

  D.Having missed it

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