题目内容
19.In the western mountains where there is plenty of rainfall,trees are extremely tall,some over 80meters.( )A. | measured | B. | measuring | C. | are measured | D. | measure |
分析 在西部山区降雨量充沛,树木长得相当高,(测量起来)有的高达80多米.
解答 答案:B
此处measure"测量起来…",用作不及物动词,无被动形式;与句中的主语trees构成主谓关系,所以要用它的现在分词形式;"some over 80 meters."在句中作主语补足语;A.measured是过去分词,与主语构成被动关系,所以A不正确;C.are mesured是被动语态形式,在被动语态句中作谓语;故C不正确;D.mesure表示一般现在时,在句中作谓语,因此D不正确;故选B.
点评 本题考查了现在分词作主语补足语的用法.作此类题时,首先应弄清该空缺处在句中所作的成分,然后判断它与主语是否构成主谓的关系;另外,句中的measure是不及物动词,因此它不能用于被动语态;由于此处的分词短语在句中作主语补足语,所以这里不能填谓语动词;分析句子可知,它与主语构成主谓关系,所以要用现在分词;因此做本题的关键是要掌握现在分词以及不及物动词measure的用法.
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