The room was so quiet that she could hear the _____ of her heart.
Martin was_____ to win the 100-meter race, but he fell to the ground and missed the chance.
The roads have ______ because of people’s dependence on cars.
Green organizations are trying to save rain forests that have been _____ by farmers.
After dinner he gave Mr Richard ______ ride to ______ Great Wall.
______ I admit that all these problems are difficult, I don’t agree that they can’t be solved.