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A survey has shown that 40% of those kil...

A survey has shown that 40% of those killed in traffic accidents _____ if they had been wearing seat belts.

A. should have been saved                                    B. must have been saved

C. need have been saved                                       D. could have been saved

 

D 【解析】 试题分析:考查情态动词+完成式的用法:句意:一项调查表明40%的在交通事故中丧生的人如果戴好安全带可能就能得救。用could have done表示“本来可能做却没有”,Should have done本应该做而没有,must have done一定做过…,need have done本需要做却没有做,都不符合句意,选D。 考点:考查情态动词+完成式的用法
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