có vài câu  e kolmđc vs ko chắc lắm vê nghĩa ạ

on a diet : ăn kiếng    - on account of: bởi vì, do là  

- on again, off again: chỉ 1 vc diễn ra ko  liên tục, khi có khi ko                     

 - on average: trung bình         -on grounds of: dựa trên       on his behalf: thay mặt            -on no account: ko vì lý do nào   -on sale: giảm giá  -on the air: phát sóng   -on the basis of: dựa trên

on the go: hđ tích cực       -on the other hand: mặt khác    

-on the verge of: trên bờ vực của      -on condition that: vs điều kiện là

on purpose: cố tình      -on second thought : nghĩ lại thì    

-on very good terms :mối qh tốt

1.    She was chosen for the job - on average  her qualifications

2.    Discrimination: kỳ thị on grounds of sex, race in that country has been increasing dramatically.

3.    A wide range of postcards and other souvenirs are  on sale 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 on his behalf

7.    They agreed to tell the truth on condition that 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 on a diet  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 on very good terms   ever since we graduated.

11. We are not ............... and don't speak to each other much.

12. We delayed our departure on account of the bad weather

13. All of these people operating behind the scenes work to put the newcast

14. I’m sorry. I didn’t break the vase on purpose

15. I thought I'd go to the movies, but  on second thought I 'd rather stay home.

16. I've been on the go all day, and I'm really tired.

The show was on again, off again being canceled due to low ratings