___________ we can have clean drinking water lies in ___________ effective measures will be taken by the government about water pollution.
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.
Every possible means ________ to prevent the air pollution,but the sky is still not very clear.
It is reported that 40 percent of the land in Brazil________covered with trees.
Either the judge or the lawyers________wrong on the case at that moment.