1.I don't think she is the tallest in class.

2.She sing better than her sister.

3.Because it is raining outside at the moment,we decide to not go out.

4.Do morning exercise is pivotal.

5.In her free time,Nhung takes pleasure to read comics.

6.Khai is easy-going person,so he has a lot of friends.

7.A 3-year-old is taking my grandparents at present.

8.Mr.Oanh is one of the most famous collector in my world. 

1. I don't think she is the tallest student in my class.

2. She sings better than her sister (does).

3. Because it's raining outside at the moment, we decide not to go out.

4. Doing morning exercise is pivotal.

5. In the free time, Nhung takes pleasure in reading comics.

6. Khai is an easy-going person, so he has a lot of friends.

7. A 3-year-old boy is talking to his grandfather at present.

8. Mr. Manh is one of the most famous collector in the world.