Banyantree212
1,是的.a member of apples2,twelve-year-old是代词,代指12岁的人,前面的the twelve是数量词,全句的意思是这12个12岁大的孩子们,所以要加s3,有一些建造的不是很好的学校,因为是there are,所以后面的school要加s
babycarolyn
A is that one for B.A是B的唯一。就可以用上面的或者A is only one for B.或者A is special one for B.
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