问题描述：
两个英语问题,
1.This is one of the presents my parents gave to me on my birthday.这句话可否这样写：This is one of t2.he presents which was sent by my parents on my birthday.(顺便再帮我讲一下 was 为什么可以省略?)
2.great persons为什么会有这种形式?person的复数不是people吗
1.This is one of the presents my parents gave to me on my birthday.这句话可否这样写：This is one of t2.he presents which was sent by my parents on my birthday.(顺便再帮我讲一下 was 为什么可以省略?)
2.great persons为什么会有这种形式?person的复数不是people吗
问题解答：
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