III: 3, much→many

4, in→on

5, has→have

6, What→How?

7, furnish→furninshing

8, an→∅

9, much→many

10, in→on

11, is→be

12, a→an

13, watching→to watch

IV: 1, C

2, A

3, B

4, D

5, A

6, C

7, B

8, D

VI: 1, What awful and terrible weather!

2, No one in his class is more intelligent than Nam

3, What is Tan's address?

4, The bathroom has a sink, a tub and a shower

5, What a boring film!

6, Her father goes to work by bus everyday

7, Pink and white are her favorite colors

3: much -> many
4: in -> on
5: has -> have
6: work -> do
7: furnish -> furnished
8: an -> the
9: much -> many
10: in -> on
11: is -> be
12: is a -> an
13: watching -> to watch

IV:

1: C
2: A
3: B
4: D
5: B
6: C
7: B
8: D

V:
 My name's Truong. I'm 10 years old. I am studying at Le Quy Don Secondary school. My hobby is learning English. My family has 4 people: my parents, my sister, and me. My mom is a cook. She always cooks lunch, dinner for all members. And she also does the housework too. My dad is a driver, so he is seldom at home. My sister is 9 years old, and also a student like me.

VI:

1: What the awful and terrible weather!
2: No one in this class is more intelligent than Nam
3: What's Tan's address?
4: The bathroom has a sink, a tub, and a shower
5: What a very boring film!
6: Her father goes to work by bus
7: Pink and white are Hoa's favourite colour