tập hợp A={1;2;3;4;5;6} có bao nhiêi tập con gồm 3 phần tử trong đó luôn có phần tử 1

Hướng dẫn cách làm giúp mình luôn nhé!

1. Why don’t we go to the cinema together?

2. There are a lot of wine bottles in my house.

3. I would like to have a sandwich and coke.

4. Her hobby is playing sports in her free time.

5. It took me 2 years to to this project.

1. A → Will

2. B → using

3. B → Therefore

4. D → vitamins

1. We always go to school on time.

2. How many hours a week does he often work?

3. American students do not usually wear school uniforms.

4. Nam has Science at 10:00 on Wednesday.

5. I like Math because it is interesting.

6. What subject does Tom like best?

7. We want to work with you.

8. Excuse me! Is there a post office near here?

9. Mai is interested in doing experiments.

10. Huong will be twelve on Saturday, November 20th.