bài 1: điền giới từ thích hợp vào chỗ trống 1. he is listening.............music at the moment 2. many people in the world are fond............football 3. he has been out of work...........a long time 4. my class starts..........7.00 o'clock 5. he goes to work.......bus 6. on a summer sunday, most of the roads are crowded...........cars 7. she is keen..........drawing 8. he left school.............the age of 18 9. faraday was born..............a poor family 10. I'm going on holiday...........the end of this month