has collected-was

to spend

will try

underline-to learn

to move

working

to water

fly-is

is

playing

spending-going

watching

making-drawing

eating

turning

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

Bài 3: 

a: Theo đề, ta có hệ phương trình:

\(\left\{{}\begin{matrix}4a+b=3\\2a+b=-1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2a=4\\2a+b=-1\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=2\\b=-1-2a=-5\end{matrix}\right.\)

1.C 2.B 
Chúc bạn học tốt

II.

1.C

2.B

3.B

4.D

5.D

6.C

7.D

8.A

9.A

10.D

11.A

12.C

13.C

14.C

15.D

1 Yesterday the plane took off earlier than I expected

2 My mother looks after us more carefully than my father

3 They cut the big cake into smaller parts than I thought

4 My sister even tells me off more often than my mother does

5 Who saw you off yesterday?

6 It is cold today so I put on more warm clothes than usual

7 Yesterday my mother picked my up later than usual

8 You are the pretties girl I have ever known

9 Unless you listen attentively to your teacher, you won't catch up with your friends

10 By far, "The Little Prince" has been my favorite book

39 be on time for your interview

40 tall is she

41 What is she like?

42 have you been in this city?

43 is the price of those books

44 How did she greet friends?

45 What did she walk to the station for