8: 7/5=(7a-21)/(5a-15)

(7a-31)/(5a-15)=(7a-31)/(5a-15)

26 has your friend, Jenny learned

#\(Errink \times Cream\)

#\(yGLinh\)

3:

a: OA và OC là hai tia đối nhau

=>O nằm giữa A và C

=>AC=OA+OC=5+5=10cm

OA và OB là hai tia đối nhau

=>O nằm giữa A và B

=>AB=AO+BO=5+8=13cm

AC<AB

=>C nằm giữa A và B

=>AC+CB=AB

=>BC=3cm

b: O nằm giữa A và C

OA=OC

=>O là trung điểm của AC

1.C

Em ko thấy biểu đồ câu 2

mik nhìn chắc hư mắt luôn á:(

bạn chia ra đi

II

1 driver

2 participants

3 useless

4 electrician

5 building

6 variety

7 creative

8 poisonous

III

1 B => happy

2 C => between

3 B => seriously

4 A => excited

5C => to spending

6 B => ought to be

7 C => for

8 her => herself

IV

1 to buy

2 has been

3 will be going

4 to work

5 saw

6 to lock

7 don't know

8 are wasting

D Reading

1 T

2 F

3 T

4 F

II

1 to

2 Most

3 However

4 use

III

1 In Milton Keynes, a town about 70 kilometres northwest of London.

2 They can select their terminal, read the news, check e-mails or play video games.
3 No, they aren't

4 Yes, they are

E WRITING

1 Flying car will be showed to the public when they finish it

2 Unless we try to save sources of energy, they will soon end

3 Long's collection has over eight hundred stamps

4 The stomachache prevented Mr Thanh from enjoying the meal

5 Is this the best hotel you could find?

6 This is the first time I have seen that man

7 The coffee is too hot for me to drink

8 It took Peter three hours to repaint his house

II

1 This time tomorrow they will be studying in the library

2 I think biogas is abundant and cheap for cooking and heating

3 Is wind a renewable source of energy?

4 We should reduce the use of electricity to save our energy