1 . ______, important advances have been made in medicine and environment science thanks to increasing computer power.

A．By accident

B．After all

C．In addition

D．On average

2 . 选词填空

apart from, break into, come up with, contribute to, focus on, for instance ,in addition, lead to, on top of, work on

1. The overpass suddenly fell down on three cars, _________ three people's death, a man and a mother with her daughter.
2. The company provides cheap Internet access.   _________, it makes shareware freely available.
3. The shopkeeper felt desperate when his shop _________ once again.
4. _________   great pressure in the job, I found it was no better than my previous one.
5. When you go to such a party, you can wear something simple, _________, a skirt and blouse.
6. If I choose to _________ other projects in my own time, then I say that is my business.
7. I hope that you will think about it thoroughly when you _________ an idea next time.
8. I am sure that this meeting will _________ promoting peace and security all over the world.
9. Pick out the magazines you like most and put them _________ the pile of books.
10. He felt he needed to _________ his career rather than find a girlfriend first.

3 . Most people work because it’s unavoidable. ________, there are some people who actually enjoy work.

A．As a result	B．In addition
C．By contrast	D．In conclusion