3. According to Professor Zog, there is no life on Earth.
举一反三
- How may insomnia affect one’s life according to the conversations between professor Day and Betsy?
- If there were life on Mars, such life forms __________ unable to survive on earth.
- Without sunlight or water or air, there _____ no life on the earth.
- According to Professor Schwartz, ___________.
- Why does the earth become cool? A: Because the sun gives the heat to the earth. B: Because the moon gives the wind to the earth. C: Because the earth rotates . D: Because the sun's heat bounces to the space.