Moths(蛾) are changing their colors to ______the polluted backgrounds on which they rest. A.meet withB.agree withC.fight againstD.stay with
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B解析meet with 遇到, agree with 与...一致, fight against 与...斗争, stay with 留下与...在一起。此句意为蛾子要使自己的颜色与污染了的环境保持一致, 才可不易被天敌发现, 达到自我保护的目的。