If you keep on your research, you’ll succeed ________.

A. in time 　 B. at no time 　 C. on time 　　　 D. at the same time

I have ____ all my papers but I still can’t find my notes.

A. looked through　 B. looked for　　　　 C. looked after　 　　　　 D. looked out

A cup of water_____you will feel better.

A. or B. but C. so D. and

I’d prefer ______ in the office rather than _____ at home watching TV.

　 A. working; staying 　B. working; stay　 　　C. to work; stay　 　　D. work; to stay

Obama promised in the presidential race to lower the tax rate for those ________ annual income is below $250,000.

A. which B. that C. whose D. their

Low-carbon lifestyle is of great benefit to improve the world environment．　　　　 can be enjoyed from it until you have a deep understanding of it，however．

A．Something　 　　 B．Nothing　 C．Few D．Much

Edison made a lot of inventions __________ of great importance.

A. which I think are　 B. which I think they are　 C. which I think they　 D. I think which is

The film is very interesting ._____ students have seen it.

　 A. A great many　　 B. A great deal　　　　 C. A plenty of 　 D. Many of