Unlike the fossil fuels of today, biofuels are renewable sources, which mean that they will not easily.
A. e out
B. break out
C. turn out
D. run out
网友回答
A. e out
B. break out
C. turn out
(答案→)D. run out
解析:考查动词短语辨析。A出版发行;B(战争,火灾)爆发;C结果是,原来是,证明是;D用完,耗尽;句意:和现在的化石燃料不一样,生物燃料是可再生的资源,这意味着他们不会容易地就用完了。根据句意说明D项正确。