At the 2003 Special Olympics in Ireland, more than 6,500 athletes from over 150 countries .
Sam _____ some knowledge of the computer just by watching others working on it.
----- How did you do in the test ?----- Not so well. I ______ much better but I misread the directions for Part D.A. could have done B. could do C. must have done D. should do
Maintaining (维持) peace and stability of the South China Sea and the East China Sea will certainly ____ a more prosperous Asian-Pacific area.
So many people violate traffic regulations that we ____ put too much emphasis on the importance of traffic safety.
The suggestion, ____ by the locals, proved to be a very constructive one.