英语四级

单选题

A． They are cheaper.
B． They do not pollute.
C． They are simpler to drive.
D． They are faster.

参考答案：B进入在线模考
What is the main advantage of electric cars over gas-powered cars?
【解题思路】
1．四项均为以they开头的句子，they可能指代的是电动汽车。
2．四项都涉及优势(cheaper，do not pollute，simpler,faster)。
结论：本题可能考查电动汽车的优势，需留意相关细节。
【解析】短文中提到：迄今为止电动汽车似乎是最好的替代品，它的一大优势就是不会污染环境。故选B。

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