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1/

1. Vietnamese people cook special foods to make preparation for Tet.

2. I went to school last Sunday.

3. I go to the zoo every two week.

4. There are many trees in my village.

5. He visits his family twice a year.

2/

1. Although he is intelligent, he can't answer that question.

2. In spite of being a poor student, Minh studies well.

3. Despite staying up late, Lan gets up early to do homework today.

4. It is raining heavily; however, we go out.

5. Although they are poor, they are always happy.

6. In spite of being rich, he doesn't buy a house.

7. They are poor; nevertheless, they are kind and generous.

8. In spite of the bad weather, they went camping yesterday.

9. Although he is busy, he still helps his mother with housework.

10. Although she is beautiful, people don't like her.

Bài 1:

1. We decorate our house to make preparation for Tet.

2. I visited my grandparents last Sunday.

3. They go to picnic every two week.

4. There are many trees in my village.

5. My sister goes to the dentist twice a year.

Bài 2: 

1. Although I was tired, I go to bed late.

2. Although the car was dirty, he didn’t wash it.

3. Although he likes chocolate, he tries not to eat it.

4. Despite the traffic jam, we went home early.

5. In spite of the rain, the children were still happy to play in the garden.

6. Despite being tired, he walked to the station.

7. I studied very hard. However, I failed the exam. 

8. They played well.However, they still lost the game.

9. I didn't like the film. Nevertheless, everyone else seemed to enjoy it.

10. I haven't won yet. Nevertheless, I will keep trying.