题目内容
14.The old scientisthas devoted (devote) his lifetime to studying a cure for lung cancer since 1965.分析 这位老科学家自从1965年以来就致力于研究肺癌的治疗方法.
解答 答案是has devoted.本题考查动词的适当形式;根据题干中since 1965判断句中需要现在完成时,主语是第三人称单数,故答案是has devoted.
点评 本题是要求用所给词的适当形式填空,解题时首先考虑句中需要的词性;其次,如果是谓语动词关注时态、语态和数的变化;如果是非谓语动词要联系非谓语的基本用法判断非谓语的形式;如果是名词关注单复数.
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