Bài 1: Choose at, in, on to complete the sentences 1. See you later ______ Monday. 2. I drink milk ______ in the morning. 3. The plane leaves ______ 9 o’clock. 4. They have lunch ______ midday. 5. She’...

1. See you later on Monday. 2. I drink milk in the morning. 3. The plane leaves at 9 o’clock. 4. They have lunch at midday. 5. She’s tired at present. 6. My friends always give me presents on my birthday. 7. My grandfather was born in the 19th century. 8. She often visits her family in summer. 9. We always get together at Christmas. 10. He may go out at the weekend. 11. Can you come on Friday? 12. It snows a lot in winter. 13. My birthday is on the 17th of October. 14. I usually brush my teeth at half past six. 15. My grandmother died in 2000. 16. She isn’t here at the moment. 17. The weather is often terrible in London in January. 18. Columbus sailed to the Americas in the 16th century. 19. My birthday is in September. 20. They met each other at 7pm.