SoalthoughFlemingdiscoveredpen

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

A．when

B．that

C．before

D．unless

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------Not at all. It couldn’t have been___.

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------Yes. It was not yet eight o’clock____ he arrived home.

A．before

B．when

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A．so that

B．so as to

C．in order that

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A．Having been told	B．Though to be told
C．Having told	D．He was told

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--I’d like some, but I’m _____

A．on diet

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