Chứng minh rằng trong một tam giác, nếu trung tuyến ứng với một cạnh bằng một nửa cạnh ấy thì tam giác đó là tam giác vuông?

1)Qua bút kí Ca Huế trên sông Hương , trình bày cảm nhận của em về cố đô Huế, những làn điệu ca Huế và những con người tài ha xứ Huế.

Exercise 10: Use the correct form of verbs

1. Be careful! The car (come) is coming.

2. Don’t forget (turn off) to turn off the lights before going out.

3. Children should (spend) spend only a small part of their free time (play) playing video games.

4. I was watching TV last night. (watch)

5. Hoa should (go) go to school on time.

6. Nam likes (watch) watching videos in his free time.

7. The police can (identify) be identified the robbers by studying the video.

8. She prefers (socialize) socializing with her friends.

9. How about playing chess tonight? (play)

10. I hate crossing the roads. (cross)

1. My mum used to live in a small village when she was a girl. 2. There did not used to be (as) many vehicles on the roads 3. We used to cycle to school two years ago. 4. Now there are more traffic accidents than there used to be. 5. My uncle used to be a bus driver some years ago, but now he has a desk job.