1. There are lots of parties ..at....Christmas

2. I received a letter ..from... my friend yesterday

3. She usually goes swimming ..on.... Sunday mornings

4.Khoi is my close friend .I spend most of my free time...on... him

5. He does volunteer work ..in... a local hospitall

6. His friend didn't laugh ...at.... his jokes

7. My friend usually enjoy my sense ...of.... humor

8. He lives ....at.... 26 Tran Phu Street ..in... Hanoi.
V.

1. He fell off the bike, but his injury were not serious. (injure)

2. She gave me a demonsstration of the new house. (demonstrate)

3. The shop assistant showed me a lot of new models. (assist)

4. You must read the following safely precautions carefully. (safe)

5. You shouldn't talk about her character only through her appearance. (appear)

6. We are waiting for the arriving of our uncle's train. (arrive)

7. The increase in population has led to crowded in many cities. (crowd)

8. We had a terible trip because the weather was unpleased (please)

9. If you want to get more information ., please contact Mr.Phong. (inform)

10. It's a good a restaurant, the food there is very tasty.