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ofthestudentswhotookpartinthemilitarytrainingis450a,anumberb,alotc,lotsd,thenumber

题目详情
____of the students who took part in the military training is 450
a ,a number b ,a lot c,lots d ,the number
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答案和解析
D,the number of 表示数量,后面接可数名词复数.做主语,谓语用单数.
谓语为 系表结构 is 450.who took ...training为定语从句.