题目内容
15.Nowadays Chinese pedestrians feel caught between morality and trick:should they help an elderly person who ______ into the street?( )A. | has fallen | B. | is falling | C. | had fallen | D. | was falling |
分析 当今,中国的行人在道德和骗局之间左右为难:路上跌倒的老人到底扶不扶?
解答 答案A.考查现在完成时.冒号后的句子结构为:should they help an elderly person为主句,who ______ into the street为who引导的定语从句,修饰先行词an elderly person.从句的动作"fall(跌倒)"发生主句谓语动作"should help(帮助)"之前,又因整句话时态为现在时,故采用现在完成时,表示过去发生的动作(跌倒)对现在存在的影响.现在完成时的构成:have/has+动词的过去分词,故选A.
点评 考查时态的题,可根据以下三条进行确定:具体的时间词,如nowadays;句中其他谓语,如feel caught;句子的意思.
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