was taking

had to

Was taking

Had to

Câu 28: C

Câu 29: B,D

khó nhìn quá :) câu 27 sao câu A,B.C giống nhau z :)

Bạn giải giúp mình Vs mình đang cần gấp 

6. C

7. B

8. D

Part 1

1 if

2 after

3 that

4 so

5 should

6 from

Part 2

1b 2e 3a 4f 5c 6d

Part 3

1 conservationists

2 to take

3 hasn't provided

4 works

5 disappointed

6 achievement

7 polluted

8 dissolve

Part 4

1 will get -> get

2 amazing -> amazed

Part 5 

1 use fresh water economically

2 school because the bus

3 they should keep

4 which is in this

Part 6

1 fond

2 watching

3 listened

4 or

Part 7 

1T 2F 3T 4F

lỗi r nha bn

lỗi

a: Xét ΔAMC và ΔBMD có 

MA=MB

\(\widehat{AMC}=\widehat{BMD}\)

MC=MD

Do đó: ΔAMC=ΔBMD

TH1: x>=-5

=>3x+1=x+5

=>2x=4

=>x=2(nhận)

TH2: x<-5

=>-3x-1=x+5

=>-4x=6

=>x=-3/2(loại)