Cho tam giác ABC nhọn ( AB < AC ) . Gọi O là trung điểm  của BC , qua B kẻ đường thẳng song song AC cắt tia AO tai E .

a, Cm : tam giác BOE = tam giác COA.

b,Vẽ AH vuông góc với BC . Trên tia AH lấy điểm K sao cho H là trung điểm của AK . Cm : CK =BE .

c,OH =12 KE

ggigiugiupgiúpgiúp mmkmk vs

4   Complete the sentences with the school subjects below.

ICT   biology   geography   economics   chemistry   history   DT

1   We study the life of plants and animals in __________.

2   __________is the study of kings, queens, wars and empires.

3   We make plans and projects using a computer in _____________.

4   We study ______________ in the science lab.

5   _____________is the study of computers and the Internet.

6   We learn about countries, climate and maps in ___________.

7   We learn about money and business in ____________.

2   Complete the sentences with the affirmative or negative form of have to.

1   I _have to______ do homework every day, only on Mondays and Tuesdays.

2   We _______ train for three hours at swimming lessons every Saturday. It’s very hard.

3   My brother _______ come home before 11 p.m., but I do!

4   When they’re seventeen, English students only _______ study four subjects. They’re lucky!

5   We haven’t got a car, so my dad _______ go to work by bus.

6   We _______ wear a uniform at our school. I usually just wear a sweatshirt and black trousers.

7   I _______ clean my bedroom every Saturday! I hate it!

Giúp mình với

Question 1: Rewrite sentences as directed.

1. Why don’t you take that English course?

If.............................................................................................................................................

2. You forgot to turn off the TV last night, didn’t you?

You didn’t    ?

3. Despite his age, Mr. Thanh runs five kilometres every morning. Even..............................................................................................................................................

4. He didn’t finish his work until the bell rang.

Not until.........................................................................................................................................

5. When he is asked about his past, he hates it.

He hates..........................................................................................................................................

6. Without Tom’s help, Bill couldn’t have finished the work.

If it..................................................................................................................................................

7. William said to Mary “Why don’t you put your luggage under the seat?”

William suggested..........................................................................................................................

8. “It’s time we went to bed” they said. (Rewrite, using reported speech)

.......................................................................................................................................................

9. The robbers made the bank manager hand over the money.

The bank manager ........................................................................................................................

10. She hasn’t been to Ho Chi Minh City for three years.

The last..........................................................................................................................................

11. I cleaned the floor then I went to bed. After...............................................................................................................................................

12. “Don’t forget to send your parents my regards”, she said to me.

She told........................................................................................................................................

13. “Would you like to dance with me?” she said to John.

She...............................................................................................................................................

giúp ik ~~ ghi nghĩa giúp mềnh nha

à

We don’t go / aren’t going to school – it’s Saturday today!

ÒAAAAAAAAAA