Although Fleming discovered Penicillin, it was over a decade ______ someone else turned it into the great drug of the 20th century.
A.beforeB.sinceC.whenD.a(chǎn)s
A

試題分析:考查固定句式:It was/will be+一段時(shí)間+before…“要過(guò)多長(zhǎng)時(shí)間就/才…”,句意:雖然弗萊明發(fā)現(xiàn)青霉素,但是10多年后其他人才把它變成20世紀(jì)偉大的藥物。選A。
點(diǎn)評(píng):固定句型考的是平時(shí)學(xué)生的詞匯和短語(yǔ)的積累量,對(duì)常見的固定句型要了然于心,了解每個(gè)選項(xiàng)的含義是做好此類題型的關(guān)鍵,對(duì)于這類題,可從句意著手,同時(shí),對(duì)于平時(shí)的學(xué)習(xí)要多進(jìn)行積累詞匯,考試時(shí)才能很好的完成。
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