___my father___my mother are doctor选择题
问题描述：
___my father___my mother are doctor选择题
___my father___my mother are doctor
1,Neither,nor 2,Not,only 3,Both,or 4,Both,and
答
4
首先排除不靠谱的2,3
注意谓语动词是复数 are, 排除1.
Both my father and_my mother【 are 】doctors
比较：
Neither my father nor_my mother【 is 】 a doctor
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