Cho (O) và 2 dây EF và CD bằng nhau và vuông góc với nhau tại I. Biết IC = 2cm,ID =  14cm. Tính khoảng cách từ O đến mỗi dây

Cho (O) và 2 dây AB và CD bằng nhau , cắt nhau tại E

Cho (O ; 5cm),dây AB = 8cm.

a.Tính khoảng cách từ O đến dây AB.

b.Gọi I là điểm thuộc dây AB sao cho AI = 1cm. Kẻ dây CD đi qua I và vuông góc với AB.Chứng minh CD = AB

Biến đổi câu

1. Please don't tell anyone about it.

-> I'd rather you ............

2. I would prefer you to deliver the sofa this afternoon.

-> I'd rather you ..........................................................................................

3."Why don't you ask her yourself?”

-> My friend suggests that .............................................................................

4. She urged her husband to apply for the post in the government.

->She urged that her husband .......................................................................

5. They insisted on my coming early.

->They insisted that ......................................................................................

6. An accountant needs to master computer science.

->It is necessary that ....................................................................................

7. It's time for us to leave now.

->It's time we ....................................................................

8. What a pity! Your sister can't come with us.

->If only .................................................................................

9. Everyone finds it important for us to do something save the environment.

->It is important that we.......................................................................................

10. Michael lost his job last month, so he cannot buy a car.

->If Michael .........................................................................................................

11. He regrets applying for the job in that company.

->He wishes ........................................................................................................

12. The headmaster insists on every schoolgirl's wearing ao dai every Monday.

->The headmaster insists that...............................................................................

13. They advise her to eat less meat and fat to keep herself healthy.

->It is advisable that she.......................................................................................

14. Naturally, a child had better respect his parents.

->It is natural that.......................................................

15. He needs to come to the interview early.

-> It is necessary that............................................................................................

16. She must find it important to take two medicines every day.

->It is important that ..............................................................................................

17. It's too late. He must go home.

->It's high time he ........................................................................................

18. Every student must wear uniform. It is obligatory.

->It is obligatory that .............................................................................................

19. They recommended her to go to the best doctor in town.

->They recommended that she...............................................................................

20. The man demanded to be told everything about the accident.

->The man demanded that.....................................................................................

Chọn câu trả lời đúng

1.  In Vietnam, it is normally                   in the South than in the North.

A. hot                                B. hotter                         C. hottest                          D. hoter

2.  The food is                  than the last time I ate it.

A. badder                          B. bad                             C. worse                          D. worst

3.  Ho Chi Minh city is                   than Hanoi.

A. big                                B. bigger                        C. biggest                         D. biger

4.  Her voice is                  than her sister’s.

A. beautiful                       B. more beautiful c. beautifully                               D. more beautifully

5.  Her literature result is much                    than it was last year.

A. good                                   B. well                            C. more well                    D. better

6.  Cinderella danced                   than any other girls at the ball.

A. more graceful               B. gracefuler                   C. gracefully                    D. more gracefully

7.  This book is the                   of all.

A. bored                            B. boring                        C. more boring                 D. most boring

8.  Mary speaks English very                 

A. fluent                            B. fluently                      C. more fluently               D. most fluently

9.  Tom runs faster than John and David runs the                   in the group.

A. fast                                B. most fast                    C. fastest                          D. most fastly

Rewrite using the word given in CAPITAL

1. Do you ever regret not going to university?                          WISH

-> ………………………………………………

2. I should really be leaving.                                                     TIME

-> ………………………………………………

3. I’d rather have beer than wine                                              PREFER

-> ………………………………………………

4. Jack doesn’t know all the answers, though he pretends so.   ACTS

-> ………………………………………………

5. I’d love to be able to go with you to the opera.                     WISH

-> ………………………………………………

6. I wish I hadn’t sold that old painting.                                   PITY

-> ………………………………………………

7. It would be better if you didn’t stay long.                                       RATHER

-> ………………………………………………

8. The management insisted on our wearing dark suits.             WEAR

-> ………………………………………………

9. Why do you have to complain all the time?                          WISH

-> ………………………………………………

10. I don’t want to go to the meeting.                                                RATHER

-> ………………………………………………