[解析]
(1)推理判断题。根据第二段中Plug﹣in hybrid cars(电混动力车) and battery electric vehicles are super﹣quiet,and a study at the University of California,Riverside concludes that people listening to recordings on headphones can hear a regular gas car coming from 28 feet away,but a hybrid in battery mode only when it's 7 feet away.(插电式混合动力汽车和电池电动汽车是超级安静的,加州大学河滨分校的一项研究得出结论,人们戴着耳机听录音时可以听到28英尺开外的普通汽油车,但混合动力车只有在7英尺开外才能听到。)可知,作者是通过比较戴着耳机听录音时可以听到普通汽油车和混合动力车的距离来表明电动汽车很安静。故选B。
(2)细节理解题。根据第三段最后一句That sound will come into play when the car is traveling backwards or when it's traveling at less than 12 miles an hour﹣﹣speeds at which cars are more likely to be mixing with pedestrians.(当汽车向后行驶或以低于每小时12英里的速度行驶时,这种声音将开始响起﹣﹣在这种速度下,汽车更可能与行人相撞。)可知,当汽车向后行驶或以低于每小时12英里的速度行驶时,这种声音将开始响起以警告行人电动车的到来。故选D。
(3)细节理解题。根据第四段中"We're calling on the government to take this announcement further by requiring AVAS on all existing electric and hybrid vehicles and ensuring drivers have them switched on," John Welsman,a guide dog owner and Guide Dogs staff member,said in a statement.("我们呼吁政府进一步落实这一声明,要求所有现有电动和混合动力车辆配备AVAS,并确保驾驶员打开它们,"导盲犬主人、导盲犬工作人员约翰•韦尔斯曼在一份声明中表示。)可知约翰•韦尔斯曼呼吁政府进一步落实这一声明,故选C。
(4)标题概括题。阅读全文,并根据文章第一句There's a continuing controversy over whether electric vehicles should produce sounds to let the blind and other pedestrians know they're on the scene.(电动汽车是否应该发出声音,让盲人和其他行人知道他们在现场,这一问题一直存在争议。)可知,本文主要讨论的是电动汽车是否应该发出声音的问题,选项C."电动汽车当前的问题"符合文章主题,可作为最佳标题,故选C。