So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century.

试卷相关题目

• 1I shall never forget those years _____ I lived on the farm with the farmers, ______ has a great effect on my life.

  A.when;who

  B.that;which

  C.on which;that

  D.when;which

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• 2I have no idea ______ Jim could get so much money in such a short time.

  A.what

  B.how

  C.why

  D.when

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• 3How can you keep fit ______ you smoke so much?

  A.as

  B.while

  C.when

  D.for

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• 4We are worried about ____ they can be rescued.

  A.that

  B.whether

  C.if

  D.what

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• 5______ he did not want to, he still had to share his hotel room with a stranger.

  A.Because

  B.Even though

  C.When

  D.As if

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• 6_____ hungry you are, you shouldn't start to eat before the whole family gather around.

  A.How

  B.However

  C.Unless

  D.If

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• 7Walk down our street any day _______ you will see kids playing football.

  A.and

  B.or

  C.so

  D.but

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• 8—When did your cousin begin to show his interest in medicine? —It was a Saturday _________ she noticed her uncle experimenting on a frog in his lab.

  A.that

  B.what

  C.when

  D.which

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• 9.I was about to leave_________I saw him_______ towards me, with a bag in hand.

  A.while; running

  B.when; running

  C.as; ran

  D.when; to run

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• 10I got caught in the rain and was wet all over. _____I had followed my mother's advice and take an umbrella with me!

  A.As if

  B.Even if

  C.If only

  D.Only if

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