19．_____ the secret of nature，the young scientist has little time for entertainment．（　�。�
A．Devoted to bring upB．Devoted himself to bring up
C．Devoted to bringing upD．Devoting to bring up

分析 這位年輕的科學(xué)家致力于揭示大自然的奧秘，很少有時(shí)間娛樂(lè)．

解答 答案：C
題干中devoted to bring up the secret of nature作原因狀語(yǔ)，要用非謂語(yǔ)動(dòng)詞；be devoted to sth全身心投入到某事中，致力于某事，后接名詞或動(dòng)名詞；devote與主語(yǔ)the young scientist構(gòu)成動(dòng)賓關(guān)系，要用被動(dòng)，即the young scientist is devoted to bringing up the secret of nature．故選C．

點(diǎn)評(píng) 過(guò)去分詞是非謂語(yǔ)動(dòng)詞的一種，用法很靈活，分為簡(jiǎn)單式done（表示與謂語(yǔ)同時(shí)或幾乎同時(shí)發(fā)生的動(dòng)作）；完成式having been done（表示先于謂語(yǔ)的動(dòng)作）．學(xué)習(xí)時(shí)，要把握其用法特征：表示被動(dòng)和完成．同時(shí)還要注意區(qū)分現(xiàn)在分詞和不定式．

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