问题标题:
英语选择:Manyrivers-------(求解题原因)A.havebecamepollutedB.havebecomepollutedC.havebeenpollutingD.havebecomepolluting
问题描述:
英语选择:Manyrivers-------(求解题原因)
A.havebecamepolluted
B.havebecomepolluted
C.havebeenpolluting
D.havebecomepolluting
陈晓风回答:
B
首先肯定是“被污染”,用被动,排除CD
又因为become的过去分词就是它本身,所以选B
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