_________that developed countries want to limit the development of the developing countries in the climate conference in Copenhagen.
The professor explained this theory so clearly that this phenomenon was easy enough ________.
—Mike, our team will play against the Rockets this weekend. I am sure we will win. —_________.
He has devoted himself __ mankind. to benefit B. benefiting C. to benefiting D. benefited
Robert is said ____ abroad, but I don’t know what country he studied in.
Wang Gang is considering buying a computer, is considered to be a great help in our work and study.