Environmentalists
distinguishing
preparations
Disappointingly
efficient
disastrous
Easter is a joyful festival which is celebrated in many countries.
Some scientists believe that mobile phones are responsible for some health problems.
we traveled abroad was two years ago
tests are always done carefully, is a hard student
had his phone number, she could contact her old friend
quite depressed about the visit to the gallery

5. D

6. A

7. A

8. A

9. D

10. C

11. C

12. A

13. C

14. A

1. A

2. A

3. C

4. A

15. D

16. C

jimmmmmmmmmmmmmmmmmmmmmmmmmmm

he he he he he he

bài 1:

bn lấy giá trị của √(4^2-3,9^2) là dc

bài 2

AB+BC=2√(3^2+4^2)=??

Bài 5: 

a: BC=10cm

b: HA=4,8cm

HB=3,6(cm)

HC=6,4(cm)

Bài 6:

\(x^3=6+3\sqrt[3]{\left(3+2\sqrt{2}\right)\left(3-2\sqrt{2}\right)}\left(\sqrt[3]{3+2\sqrt{2}}+\sqrt[3]{3-2\sqrt{2}}\right)\\ \Leftrightarrow x^3=6+3x\sqrt[3]{1}\\ \Leftrightarrow x^3-3x=6\\ y^3=34+3\sqrt[3]{\left(17+12\sqrt{2}\right)\left(17-12\sqrt{2}\right)}\left(\sqrt[3]{17+12\sqrt{2}}+\sqrt[3]{17-12\sqrt{2}}\right)\\ \Leftrightarrow y^3=34+3y\sqrt[3]{1}\\ \Leftrightarrow y^3-3y=34\\ \Leftrightarrow P=x^3-3x+y^3-3y+1980=6+34+1980=2020\)

gfrưerrrrrrrrrrr

35 A => on the flip side

36 A => in

37 C => have been derived 

38 D => tremediously

39 B => becomes 

40 D => of which

41 C => minority languages

42 C => lie under 

43 B => happens 

44 B => percent

45 C => have been born

46 B=> of whom

47 C => as well as 

48 A bỏ đi

49 C => ethnicity

50 C => sacrificing

23.17-23.14

=23.(17-14)

=23.3 = 69

23.(17-14)=23.3=69

mình làm những bài bn chưa lm nhé

9B

10A

bài 2

have repainted

bàii 3

ride - walikking

swimming

watch

2 have repainted

4 have done 

8 have stepped

9 have you ever played

7) 1 riding -walking

2 swimming

3 watching

8)

2 my mother doesn't like listening to music

5 doing more exercises makes you healthier

còn lại ok nha

chịu ???????????????????