写出下列名词和词组的所有格1.a sister_______2.a boy________3.today______4.

写出下列名词和词组的所有格
1.a sister_______
2.a boy________
3.today______
4.a baby______
5.men_______
6.birds_______
7.two days______
8.john and mary（两个共有的）___________
9.This is________(Tom and mary`s,Tom`s and mary`s)house________
10.l visit______(Tom,Tom`s)house