“You are too selfish. It’s high time you that you are not the most important person in the world.” Peter said to his boss angrily.
The famous reporter, who is said to have gone back to America last year, _____in China for almost twenty years.
The time and effort he has devoted during the past few years____ trees in that remote area is now considered to be of great value.
After five hours’ drive, they reached ____ they thought was the place they had been dreaming of.
— People should spare no efforts to protect the environment. — ________. Air pollution does harm to our health.
The _______ of students in our class are from the country; only five are from cities.