EX12: 

1. B 

Let's + V1: đưa ra ý kiến, đề nghị

2. A 

his: tính từ sở hữu (của anh ấy)

3. D

Don't make noise: đừng làm ồn 

4. B

These + N số nhiều + are + màu 

5. C 

Who: ai (hỏi người)

6. C

What color + be + N ? hỏi màu 

It is / They are + màu 

7. A

like + Ving: thích 

8. C

Does + S số ít + V1? 

--> Yes, S + does

--> No, S + doesn't 

EX13:

How old + be + S?

--> S + be + tuổi + year(s) + old 

--> hỏi tuổi 

1. How old is your mother? She is forty-four years old.

2. How old is your brother? He is sixteen years old.

3. How old is your sister? She is twelve years old.

4. How old is your grandfather? He is seventy-one years old.

5. How old is your grandmother? She is sixty-eight years old.

6. How old is your baby? She is one year old.

`color{orange}{~LeAiFuRuiHuiBao~}`