题目内容
11.If _______ unsolved,this may lead to more serious problems.( )A. | making | B. | remained | C. | left | D. | taking |
分析 如果问题不解决,会导致更多严重的问题.
解答 答案:C 题干中if连接条件状语从句;从句中省略了相同的主语和系动词,即if this is left unsolved;leave sth undone留下某物未做.故选C.
点评 过去分词是非谓语动词的一种,用法很灵活,分为简单式done(表示与谓语同时或几乎同时发生的动作);完成式having been done(表示先于谓语的动作).学习时,要把握其用法特征:表示被动和完成.同时还要注意区分现在分词和不定式.
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