----- Nội dung ảnh ----- Exercise 3. Complete the sentences with prepositions of time "in / on / at".
1. In Viet Nam, a school day starts from 7 a.m. to 11 a.m. __________ the morning. 2. We don't have Maths __________ Thursdays. 3. My English class starts __________ 9 a.m. every Monday. 4. My school was founded __________ 1962. 5. The school year usually ends __________ the end of May. 6. Students send gifts, flowers and wishes to their teachers __________ Teachers' Day. 7. What do you usually do your __________ spare time? 8. We have lunch in the school canteen __________ noon. 9. We often have a ten-day holiday __________ January. 10. We still have to go to school __________ Christmas Day.