题目内容
19.Listening to loud music with mp3 players caused hearing loss in some teenagers.( )A. | has | B. | have | C. | is | D. | are |
分析 用MP3播放器听喧嚣的音乐已造成了一些青少年的听力损失.
解答 答案:A
分析句意可知,此处表达的是过去的事情对现在造成的结果,即:一些青少年的听力受到了损失,所以这里应使用现在完成时;由于本句的主语Listening to loud music with mp3 players 为动名词短语,故谓语动词应使用第三人称单数形式;故选A.
点评 本题考查了现在完成时强调"影响性"以及主谓一致的用法;做本题时,首先需要了解现在完成时除了强调动作的持续性以外,它还强调过去的动作对现在产生的影响以及造成的结果;例如:I have already seen the film.我已经看过这部电影了.(对现在的影响是:我知道电影的内容);I have lost my key.我把钥匙弄丢了.(造成的结果是:我进不了门了.);其次应掌握当动名词短语作主语时,谓语动词要使用第三人称单数形式.
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