31. Solar energy will be used to solve the problem of energy stortage.
32. ~ will be built in this area next year.
33. ~ will be used to heat water.
34. ~ will be replaced by another renewable source.
35. This bicycle is hers.
will + be + PII là cấu trúc bị động của thì tương lai đơn, và hers là đại từ sở hữu của chủ ngữ she, hai tính từ sở hữu her.
36. They will be learning Eng 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 of 2050.
40. I think biogas is cheap and abundant.
