1. You are to report to the manager as soons as you reach manchester -> You....
2. We managed to do the puzzle, although it was dificult. -> We...
3. Everyong is supposed to pay taxes to the government. -> Everyone ...
4. It's forbidden to go near the launch pad. -> You...
5. I'm certain Anderew didn't reveal secret. -> Andrew...
6. I'm sure Robert realised how wrong he was -> Robert...
7, It wasn't necressary for her to come early, but she did. -> She...
8. I wasn't in my office yesterday, so you must have spoken to my assistant. -> I wasn't in my office yesterday, so it....
9. I'm sure it wasn't Mrs. Elton you saw because she's in Bristol. -> It....
10. Nam wasn't at home either. Perhaps he went out with his girlfriend. -> Nam...
11. In the event, the extra insurance we took out wasn't necressary -> In the event, we...
12. It was wrong of you not to call the fire brigade at one. -> You...
13. Your sister eats a lot of junk food which is bad for her health. -> Your...
14. Sally is clumsy. She is always breaking things. -> She...
15. Amy borrowes her brother's car without asking. He was very angry -> She...
16. Liz bought an expensive jacket yesterday and now she hasn't got enough money for the rest of the week -> She...
17. We are obliged to wear a uniform for school -> We...
18. It isn't necessary for you to buy me a present -> You...
19. Do you mind if I use your telephone? -> ...
20. Everyone is supposed to pay taxes to the government -> Everyone...
21. It's forbidden to go near the launch pad. -> You...
22. I advise you to sent them a letter of aplology -> You...
23. I strongly advise you to take legal action. -> You...
24. We arre supposed to obey the law -> We...
25. It's possible that Sue will be late this evening -> Sue...

Câu 1: Trên đường thẳng xx' lấy điểm O, vẽ tia Oy sao cho góc xOy = 80 độ. Vẽ Ot, Oz lần lượt là các tia phân giác của các góc xOy và yOx'.
a, Chứng minh: Ot vuông góc OZ
b, Từ điểm A trên Oy, vẽ các tia vuông góc với Ot và Oz lần lượt cắt Ox và Ox' tại B và C. Chứng minh: AB song song với Oz, Ac song song với Ot
c, Tính số đo của góc BAC
d, Vẽ tia Am trên cùng một nửa mặt phẳng có chứa điểm B bờ Oy sao cho Am song song với Ox

Câu 2: Cho hình vẽ biết: Góc XIQ = PQI + yPQ. Chứng minh: Py//Ix