One out of five bridges in the United States is outmoded .
【正确答案】 B
【答案解析】解析:形容词辨析。outmoded过时的:outmoded ideas陈旧的观念。obsolete荒废的,陈旧的:an obsolete word已废的词。narrow狭窄的:a narrow path羊肠小道。illegal违法的,不合规定的:It is illegal to do that.做那件事是违法的。concrete具体的,有形的:A car is a concrete,but speed is not.汽车是有形的实物,而速度则不是。