3 I - my
4 her
5 Nam and Lan's teacher
6 is - Her
7 Those students' school bag
8 your - he
9 is - your
10 The woman's bikes- the men's bikes
b
1 its
2 her
3 His
4 us
5 their
6 hers
7 us
8 them
3: I want to be a teacher and my sister want to be a doctor
4: Mai likes English but her brother doesn't.
5:Nam and Lan's teacher is very nice and friendly
6:Hoa's pencil case is blue.Her friends pencil cases are violet
7:Those student's school bags are heavy
8:What is your father do?
-He is an engineer
9:How old is your sister?
-She is ten years old
10:The women's bikes are new but the men's bikes are old
b)
1:The bird sang it's happy tune
2:Listen to hers carefully
3:His uncle is a doctor.He is a nice person
4:That old men is kind to us
5:Wiliam and Tracy love thier dogs so mucch
6:My car is new but hers car is old
7:The teacher told us an interesting story
8:I want to sit between you and them