Cho nửa đường tròn tâm O đường kính AB.Một điểm C cố định thuộc đoạn thẳng AO(A khác A và C khác O).Đường thẳng đi qua điểm C và vuông góc với AO cắt nửa đường tròn đã cho tại D.Trên cung BD lấy điểm M(M khác B và M khác D).Tiếp tuyến của nửa đường tròn đã cho tại M cắt đường thẳng CD tại E.Gọi F là giao điểm của AM và CD.

a,CMR: B,C,F,M cùng nằm trên 1 đường tròn.

b,CMR: EM = EF

c,Gọi I là tâm đường tròn ngoại tiếp của tam giác FDM.CMR: 3 điểm D,I,B thẳng hàng,từ đó suy ra góc ABI có số đo không đổi khi M thay đổi trên cung BD

1. He prefers golf to tennis

-> He'd rather................

2.  I don't play chess as well as I used to

-> I used ...........

3. It takes 3 hours to drive from Hai Phong to Ha Noi

-> It's a........ .

4. Minh will be 18 next week

-> It's Minh's.............

5. If Peter is lazy , he will get bad marks

-> The lazier...........

6. She feels happy because of her coming birthday party.

-> Her coming..........

7. Her behavior annoyed me.

-> I found...............

8. The fox was unsuccessful in reaching the grapes

-> The fox tried in...........

9." You should have waited for us" The team leader said to Tom

->  The team leader criticized John............

10. The authorities will prosecute anyone they find trespassing on this land. 

-> Anyone found...........

11. Betty is very happy to look after handicapped people .

-> Betty is devoted..........

12. There wasn't any butter. We used margarine instead

-> Instead..........

13. You can only get dishes and bowls with this design in Poland.

-> Only .........

14. We didn't discover the mistake until much later 

-> Not.......

15. Flooding causes most of damage in spring

-> It's.......

16. The only reason the party was a success was that a famous film star attended.

-> Had it not...........

17. The keeper feed the lions at 3 p.m everyday

-> The lions.......

18. We got lost because we didn't have a map

-> If we........

19. That was a silly thing to say

-> What.........

20. We've run out of tea

-> I haven't ........... 

21. Susan was too excited  to sleep 

-> Susan was ......

22. Robert has not had a job for 2 years

-> Robert has been........

23. She will complete the work only she is paid extra

-> She wull not ... .........

24. It's was only when I left home that I realized how much my parents meant to me 

-> Not until........

25. That essay was excellent !

-> What......

26. He wrote the letter in 2 hours

-> It..........

27. This is her sixth appearance on stage in our city this year.

-> She has........