His efforts to raise money for his program were _______ because no one showed any intention to take a cent out of their pockets.
Now many crops can be improved ________different species of plant, such as rice, wheat.
________of food ________to the countries struck by the seaquake(海啸).
Each player of chess is trying to trap the other player's king into a position ________escape is impossible.
No matter how much you may dislike the adverts, there's no way to ________them in an age of globalization.
All of us still remember the terrible earthquake that ________Tangshan twenty years ago.