Task 9:

31. Solar energy will be used to solve the problem of energy shortage.

32. A hydropower station will be built in this area next year.

33. Coal will be replaced by another renewable source.

34. The solar power will be used to heat water.

35. This bicycle is hers.

Task 10:

36. They will be learning English this time tomorrow.

37. Solar energy will be used by many countries in the world.

38. How long does it take him to go to school on foot?

39. People won't use flying cars until the year 2050.

40. I think biogas is cheap and abundant.

31.Solar energy will be used to solve the problem of energy shortage.

32.A hydropower station will be built in this area next year.

33.Coal will be replaced by another renewable source.

34.The solar power will be used to heat water.

35.This bicycle is hers.

Bài 10

36.They will be learning English this time tomorrow

37.Solar energy will be used by many countries in the world.

38.How long does it take him to go to school on foot?

39.People won't use flying cars until the year 2050.

40.I think biogas is cheap and abundant.