1．One day, the chemist (化学家) dissolved some material in hot water.
2．What she possesses (拥有) is the ability to get straight to the core of a problem.
3．We are aware of the potential (潜在的) problems and have taken every precaution (预防)．
4．In my mind, switching from coal to gas is a good decision, which is beneficial (有益的) to energy conservation and environment protection.
5．Poor educational performance is related (有关的) to emotional disturbance.
6．My main reason for subscribing (订阅) to New Scientist is to keep in touch with advances in science.
7．The police stopped the car and they were astonished (吃惊的) to find the driver was a sixyearold boy.
8．Think carefully before you insure against accident, sickness (疾病) and redundancy.
9．And thanks to its architecture, it is still probably the bestselling (畅销的) product of its kind in the world.
10．The oceans are a key part of the natural carbon cycle, in which carbon dioxide is circulated (循环) between the land, seas and atmosphere.
11．We are willing to help but unable (不能) to do so about this.
12．They have one abnormal (异常的) gene from that parent and one normal gene from the other parent.
13．It is always the latest song that an audience applauds (喝彩) the most.
14．Nature may well know all the answers, but science has yet to prove its theories (理论)．
15．But the holders of these securities found that their value declined sharply (急剧)．
