Having taken our seats, _______.
One third of the country________covered with trees and the majority of the citizens________black people.
________of the land in that district________covered with trees and grass.
________of the people on the Net ________China's economy is among the strongest in the world.
Nobody but doctors or nurses and those ________ by Dr. Hu ________ to enter the patient's room.
The population of China ________ 1.3 billion,and 80% of the population________farmers.