The central provinces have floods in some years, and .
A. droughts in others
B. droughts are others
C. while other droughts
D. others in droughts
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(答案→)A. droughts in others
B. droughts are others
C. while other droughts
D. others in droughts
解析：因为and 连接并列的两个宾语floods and droughts , some....others 这个是固定的搭配。如果把句子补充完整就变成：The central provinces have floods in some years, and have droughts in others.因为两个句子的谓语都是have ,用and 连接起来时的时候，可以省略后边一个相同的谓语，所以就变成了：The central provinces have floods in some years, and droughts in others.所以答案选A。