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there are ______ singing teacher and ______ dancing teacher

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there are ______ singing teacher and ______ dancing teacher at this school.
A.a;a B.a;/
C.the;the D.the;/
不是就近原则吗......
答案是A
ARE是复数概念,所以a - - - and a- - - 相加也是复数概念.
再问: 不是就近原则吗
再答: 尽管是就近原则,但已经给你的谓语动词是are呀。你的句子没有让你选择 am / is / are呀。选择答案时,你不能有自己的思想,你要结合句子进行选择。
再问: 要按给的题目选答案啊
再答: 对,你不知道啊?我都惊呆了。
再问: 晕死,那为什么题目是are还选a
再答: 因为 a - - - and a- - - 相加是复数概念。
又如:Look. A man AND a woman ARE coming.
再问: 问题是现在是there are
再答: there are + 复数主语。a singing teacher + and + a dancing teachers == two teachers 。
你应该把 a-- - and a - -- 相加起来对待。

a singing teacher + and + a dancing teachers
==ONE singing teacher + and + ONE dancing teachers ==TWO teachers ------你说,two是单数还是复数啊?