3、Writing a dictionary is an arduous and difficult task but after years of hard work we are finally ().

7、Most students nowadays know that DNA contains the blueprint of life, but few remember the name of the German scientist who first discovered and () the DNA molecule (分子).

6、A chemical () is any aspect of a substance which is only seen by means of a chemical reaction (反应).

5、A bus overturned in Warsaw when fighting () between the driver and a passenger.

4、The end of WWII in Asia had a lot to do with the dropping of two () bombs on Japan.

3、In war times gold is more desirable because it is highly ().

2、Steve Jobs gave () thought to the design of Apple products.

1、The best cooking oils are usually () without heat and left with their natural color.

8、The guarantee could be () if the company goes bankrupt.Unit 4

7、The director general delivered a speech emphasizing the importance of () between universities and businesses for a vibrant economy.

6、The best coaches I ever had in football were also the coaches who possessed a deep sense of (). They were always thinking about those they were leading and rarely about themselves.