41. As the years have gone by, computers have been made smaller and smaller.
一年又一年过去了，电脑被制造得越来越小。
42. They had so much work to do that they have to take turns （in/at） looking after their sick mother.
他们都很忙以致不得不轮流照顾生病的母亲。
43. In my opinion, you should watch over your child, who often wanders in the streets.
依我看来，你应该看管好你那个孩子，他经常在街上徘徊。
44. Why are pandas in danger of disappearing?
大熊猫为什么会处于濒临灭绝的危险呢？
45. She turned round and there was an antelope with a sad face looking at her.
她转过身来，看到一头羚羊带着忧郁的神色望着她。
46. The tore companied applied to be allowed to hunt some for a fee, which made a lot of money for the farmers. （非限制性定语从句）
旅游公司申请批准作有偿捕猎，这使得农民赚很多钱。
47. I didn't catch the bus. As a result, I was late for school.
= I was late for school as a result of missing the bus.
= Missing the bus resulted in my being late for school.
我错过公共汽车，结果上学迟到了。
48. He is wearing sunglasses to protect his eyes from the strong sunlight.
他戴着太阳镜以遮挡强烈的阳光。
49. What do you suggest we （should） do to protect wildlife?
你建议我们应该做些什么来保护野生动植物？
50. I disagree that national natural protection zones should be opened to tourists.
我不同意国家自然保护区应该向旅游者开放。
51. What you do can affect the world we live in. （主语从句）
你的所作所为会影响到我们所在的世界。
52. They tried their best to bring the new law into effect.
他们尽最大的努力使这部新法律生效。
53. The number of South China tiger has risen from very few to about 60 after being left in peace with no hunting.
华南虎在停止受到猎杀后能平静生活，数量增加到大约60只。
54. Rainforests are being cut and burned at such a speed that they will disappear from the earth in the near future. （现在进行时的被动语态）
热带雨林正以如此的速度被砍伐和燃烧，以致在不久的将来它们将从地球上消失。
55. More attention should be paid to improving the living condition of farmers.
应该更加关注提高农民的生活条件。
55. He was dressed in old clothes, while his wife was wearing a very pretty skirt.
他穿着旧衣服，而他妻子却穿着一条漂亮的裙子。