7B     8A   9A     10D     11A     12C    13A     14D    15D    16C    17B      18B     19C    20C    21C   22B    23A    24A    25B  

1.Yours

2.Mine

3.Mine

4.Her

5.Your

6.Theirs

7.Our

8.My

9.Her

10.Their

11.Their

12.Hers

(-) Nga's sisters doesn't have classes on Saturday.

(?) Does Nga's sister have classes on Saturday?

1.His/Minh's future house will be on the ocean

2.There will be a swimming pool in front of the house

3.No,there will be only have solar energy

4.They will help him do housework and his homework