2. the bus which left hammersmith station … twenty-six minutes to nine…camden town had only one passenger. 3. the concert started … eight o’clock… thursday. 4. i know…experience that it's much better to stay … hotel than …friends. it's just more…convenient…everyone. 5. do you live…the centre or… the suburbs … the city? 6; you can call…us…your convenience. 7. suddenly he joined…our conversation and told us…his experiences…the antarctic. 8. what conclusion did the committee arrive…? 9. the doctor ordered her to stay…bed. 10. all…us paid attention…this interesting fact. 11. we live … a big house … all modern conveniences. 12. it is very kind…you to call my attention… this matter. 13.1 think i left my pen…home. 14. did you leave…the browns at once? — no, as a matter…fact, i stayed…them …dinner. 15. though he speaks fluent french, people often make fun…his accent. 16. whom will you invite…your birthday party? — i'll invite my grandparents, one must be very attentive …elderly people. 17. is he really…french nationality? 18. can you fetch your brother…kindergarten?
3.at/on
4.an/at/my