Điền giới từ thích hợp vào hỗ trống ----- Nội dung ảnh ----- 6 Circle the correct answer. (Khoanh tròn đáp án đúng)
1. We are studying (in / at) Sai Gon University. 2. There are 40 students (in / at) our class. 3. I saw a mouse (in / on) her shoe. 4. I'm busy now; I am finishing my final research (in / at) the moment. 5. They often make big meals (on / at) New Year's Eve. 6. In the UK, many people go home to see their families (on / at) Christmas. 7. My appointment is (on / at) 5 o’clock. 8. Luckily the weather was perfect (on / at) Thursday morning. 9. I left work (at / in) 10 o’clock last night. 10. They were very popular (in / at) the 1980s. 11. The telephone and the doorbell rang (at / in) the same time. 12. I shall see her (on / at) her wedding day. 13. The course begins (on / at) 7 January. 14. (In / At) the beginning of the week. 15. April.