on a diet - on account of - on again, off again - on average -on grounds of on his behalf -on no account -on sale -on the air -on the basis of on the go -on the other hand -on the verge of -on condition that on purpose -on second thought -on very good terms 1. She was chosen for the job on account of her qualifications 2. Discrimination ……………………….. sex, race in that country has been increasing dramatically. 3. A wide range of postcards and other souvenirs are ……………………….. in the visitors’ centre. 4. According to researchers, 400 people a year die of this disease ……………………………….. . 5. ……………………………….. should you sign the contract unless you are sure you understand it. 6. Mr Knight cannot be here, so his wife will accept the prize ………………………………... 7. They agreed to tell the truth ……………………….. their names would not be used in the article. 8. Nuclear power is relatively cheap. ………………………….., you could argue that it's not safe. 9. She has been ……………………………….. for the past two months because she put on too much weight during the winter. 10. Mike and I were pretty serious for about a year, but our relationship has been ………………………………..ever since we graduated. 11. We are not ……………………………….. and don't speak to each other much. 12. We delayed our departure ………………………………..the bad weather. 13. All of these people operating behind the scenes work to put the newscast ………………………... 14. I’m sorry. I didn’t break the vase ………………………………... 15. I thought I'd go to the movies, but ………………………………..I'd rather stay home. 16. I've been ……………………………….. all day, and I'm really tired. 17. The show was ………………………………..being canceled due to low ratings. Giúp mình với, mình cần gấp.