1 A

2 D

3 B

4 Bỏ sung hình hoặc chữ nhé

1 much

2 many

3 much

4 many

5 a lot of / lots of

6 a lot of / lots of

7 much

8 many 

9 a lot of / lots of

10 much - a lot of

11 a lot of / lots of

12 a lot of / lots of

13 many

14 much

15 much

36 You shouldn’t stay up late to play computer games

37 The bus is behind the motorbike

38 Jack’s typing is better than Tom’s

39 There are not any flowers in my house

40 We mustn’t throw rubbish around our school

\(20cm=0,2m\\ M=F.D=10.0,2=20\left(N.m\right)\)

1 an-->a

2 book--> books

3 moneys--> money

4 beefs--->beef

5 much--> many

6 many---> much

7 any--> some

8 sandwhich-->sandwhiches

9 rices--->rice

10 have-->has

1 in

2 on

3 to

4 to

5 at

6 for

7 with

8 on

9 of

10 in - in

1 chemistry

2 exploration

3 scientific

4 inactive

5 inventors

6 development

7 unnatural

8 benefical

9 conservationists

10 technological

1 A

2 C

3 C

4 D

5 A

6 C

7 B

8 C

9 D

10 C

11 D

12C

13 B

14 B

15 C

16 C

17 B

18 C

19 D

20 B. 

Cho \(A=x+1+\dfrac{1}{4x+1}\) với \(x\in\left(\dfrac{-1}{4};+\infty\right)\) 

Y/C: Tìm GTNN nhỏ nhất của A