Sure! Here are the answers filled in according to the prompts provided:

IV. Fill in the blanks:

1. You are right. We have fewer vacations (4) **than** American students. Each year, we just have about (5) **two** vacations. We have a day off for Independent Day on September 2nd, two days off on April 30th and May Day. Our most important vacation is Tet. Tet holiday often lasts for nine or ten (6) **days**. Our longest vacation is (7) **summer** vacation. It lasts for almost (8) **three** months. We usually spend time (9) **with** our families. We don’t have (10) **any** for Easter, Thanksgiving and Christmas, but we also celebrate them.

V. Use the correct form of the word given:

1. Paris is **famous** for the Eiffel Tower. (fame)
2. I think these thick clothes are very **suitable** for cold weather. (suit)
3. It's **traditional** in England to eat turkey on Christmas Day. (tradition)
4. It is a three-star hotel but it is not very **expensive**. (expense)

VI. Finish each sentence in such a way that remains unchanged.

1. No one in my class learns as well as Ba.
- Ba learns more than anyone in my class.

2. She couldn't take part in the meeting because of her tiredness.
- Her tiredness prevented her from taking part in the meeting.

3. What are you going to do when you grow up?
- What will you do when you grow up?

4. I didn’t go to school because I had to stay home to help my mom.
- I didn’t go to school because I had to help my mom at home.

Let me know if you need any further assistance!