题目内容
14.-Lots of trees ______ on the mountains last year,right?-Yes.Trees_____ there every year.( )
| A. | planted; plant | B. | plant; will plant | ||
| C. | are planted; are planted | D. | were planted; are planted |
分析 --去年在山上种了许多树,是吗?
--是的.每年都在那里植树.
解答 答案:D.根据题干的主语是trees"树",而所给选项中的动词是plant"保护"可知,主语是谓语动词的承受者,与动词plant构成被动关系,应用被动语态.根据第一个句子中的last year可知,本句应用一般过去时的被动语态,结构是was/were+过去分词,又根据trees为复数,应用were.根据第二个句子中的every year可知,本句应用一般现在时的被动语态,结构是am/is/are+过去分词,又根据trees是复数,应用are.故选D.
点评 本题是考查一般过去时和一般现在时的被动语态,做题的关键是理清主语是动作的执行者还是受动者.
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