One million of the earth’s eight million species are in danger.( )
举一反三
- 中国大学MOOC: Rainforests _______ over one million species of wildlife.
- The population in the Paris area is around （） A: two million B: eight million C: sixteen million D: eighteen million
- Rainforests _______ over one million species of wildlife. A: are home to B: are home for C: are family for D: are family to
- The Alsatian’s olfactory cells are （） times as many as man’s A: forty-four B: one million C: 220 million D: 10,000
- In the mass extinction 65 million years ago, ______ of all species on earth vanished. A: two thirds B: half C: 90% D: 30%