The fact has worried many scientists _______ the earth is becoming warmer and warmer these years.
举一反三
- The fact has worried many scientists ______ the earth is becoming warmer and warmer these years. A. what B. which C. that D. though
- Approximately, how much warmer has the Earth become over the past 200 years?
- Scientists tell us that the earth is getting ( )<br/>because of the greenhouse effect. A: warmer B: warmly C: warmth D: colder
- The weather is getting . A: warmer and warmer B: warm and warmer
- 中国大学MOOC: 2. What causes the Earth to be warmer according to the video clip?