1D 2A 3D 4B 

1B 2D 3C 4C

D

A

D

B

B

D

C

C

5: 

a: =>x^2-2x+1<x^2+3x

=>-5x<-1

=>x>1/5

b: =>x^2-4>x^2-4x

=>-4x<-4

=>x>1

c: =>2x+3=6-3+4x=4x+3

=>-2x<0

=>x>0

d: =>-7x-2>2x+3-5+6x=8x-2

=>-15x>0

=>x<0

A

1 were having

2 wasn't listening

3 was lying - was eating

4 were smiling - was taking

5 were - arguing

6 was talking

7 was - chatting

8 wasn't sleeping

B

1 was raining

2 was wearing

3 carrying

4 were leaving

5 were hurrying

6 wasn't wearing

7 was standing

8 was - following