the central province have flood in some years,and_.a drought in others b drought are others c while other droughtsd others in drought我是选了d答案是a 为什么不可以选d答案最好详细一点

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the central province have flood in some years,and_.
a drought in others b drought are others c while other droughts
d others in drought
我是选了d答案是a 为什么不可以选d答案最好详细一点

a drought in others
drought干旱
in others = in other years 呼应上句 的some years
中部省分有些年头会有供水,一些年头则干旱.