21b

22d

23a

24d

25c

26b

27 True

28 False

29 True

30 True

31 Our houses will use the sun or the mind to make electricity 

32 Watching too much tv is not good because it hurts your eyes

34 Although she was tired, she helped me with my homework

35 If the rivers aren't dirty, there will be more fish

36 My brother likes watching tv, but i like going out with my friends

III - reading

Part 1:

21b

22d

23a

24d

25c

26b

Part 2 :

27T

28F

29T

30T

IV - writing

Part 1 :

31. Our house will use the sun or the wind to make electricity

32. Watching too much Tv is not good because it hurts your eyes

Part 2 :

34. Although she was tired , she helped me with my homework

35. If the rivers are dirty , there won't be fish

36. My brother likes watching tv but I like going out with my friends