46. Scientist have found other ways to make robots move.

47. Robot requires 2 legs because it is difficult for it balance.

48. Why is it difficult for robots to walk on two legs.

49. A plane engine can make a lot of noise.

50. It is important for us to explore the Moon.

`II`

51. I think he is able to speak English very well. 

53. Although John can't swim by himself he is keen.

55. We  plant to buy a teaching robot to teach my soon at home.

`III`

56. Robots will be able to not only talk with/ to people but also understand what they think.

57. More people lose jobs but robots can do many kinds of jobs.

58. I agree with you that life will more comfortable in the future.

`Jeikei`