Here are the correct forms of the words to complete the sentences:

1. New York is an **exciting** city with many skyscrapers. (EXCITE)

2. There are many modern **buildings** in Ho Chi Minh City. (BUILD)

3. William Shakespeare (1564-1616) is a famous **playwright** in the world. (PLAY)

4. Britain's most common leisure **activities** are watching TV and films and listening to the radio. (ACT)

5. Merlion is a **creation** with the head of a lion and the body of a fish. (CREATE)

6. Sapa is a wonderful **mountainous** resort in Vietnam. (MOUNTAIN)

7. There are **various** ways of solving the problem. (VARIETY)

8. We are waiting for the **arrival** of his plane. (ARRIVE)

9. It’s not easy to find cheap **accommodation** at busy times. (ACCOMMODATE)

10. Every week, there are two **flights** from Ha Noi to HCM city. (FLY)

11. Tom is working as an **assistant** to Professor Brown. (ASSIST)

12. Read the user’s manual carefully, it will give you a lot of useful **information**. (INFORM)

13. I didn’t sleep very well that night and got a terrible headache the **following** morning. (FOLLOW)

14. What’s the **departure** time of your flight? (DEPART)

15. This knife is **useless**. It can’t cut anything. (USE)

16. He was a talented **designer**. He created many great buildings in big cities. (DESIGN)

17. Few people want to eat at that restaurant because of the **unpleasant** smell from the garbage dump nearby. (PLEASE)

18. Ben Thanh Market is one of the most famous **symbols** of Ho Chi Minh City. (SYMBOL)

19. My father has a good **knowledge** of Vietnamese history. (KNOW)

20. Hoan Kiem Lake is regarded as one of the **most well-known** landmarks in Ha Noi. (KNOW)

If you have any further questions or need additional assistance, feel free to ask!