Exercise 3: Fill in each blank with a suitable proposition (on/in/at/after) Chú ý các giới từ không viết hoa, không viết cách 1. We always have Math and Literature ………………….. Monday. 2. My birthday is …………………June 15th. 3. I often go swimming ………………… summer. 4. My family have dinner ………………………7pm 5. What do you often do ………………..the weekend? 6. My aunt lives …………………. Hanoi. 7. We moved to London …………………..2006. 8. My friends and I often have lunch ………………..noon. 9. What do you often do …………………….school? 10. …………………..the morning, my mom usually does exercise