According to the lectures, how many species have gone extinct on earth?（ ）
A: 1000.
B: 1 million.
C: 1 billion.
D: 2700.
A: 1000.
B: 1 million.
C: 1 billion.
D: 2700.
举一反三
- How many people in the world are speaking English as their first language?( ) A: 300 million B: 1.5 billion C: 360 million D: 1 billion
- According to the interview, how many people have been added to the Earth’s population in the past century A: More than two billion. B: More than three billion. C: More than Four billion. D: More than Six billion.
- What was the population of China in 1982? A: 1 billion. B: 1.3 billion. C: 10 million. D: 1.1 million.
- According to the movie-clip, How many Muslims in the world today? A: Nearly a billion B: 1.5 billion C: 2 billion
- Many species of animals have now（ ）from the face of the earth. A: vanished B: died C: ceased D: extinct