Which of the following sentences is grammatically INCORRECT？A．Every girl and every boy is
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Which of the following sentences is grammatically INCORRECT？
A．Every girl and every boy is asked to be at the school gate before 7:00.
B．Not only vegetables but also meat is important for our health.
C．The departed is a well-known novelist.
D．The young couple is quarrelling with each other.
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正确答案：D
语法规则题。集合名词作主语，强调整体时，谓语动词用单数形式，强调个体时，谓语动词用复数形式。由选项[D]中的eachother可知该句的集合名词couple强调的是个体，所以谓语动词应该用复数形式，故选项[D]表述错误，正确的表述应为Theyoungcouplearequarrellingwitheachother。