5. Man can land on Venus only when ____.
A: the algae have done their work
B: the atmosphere becomes cooler
C: There is oxygen
D: it rains there
A: the algae have done their work
B: the atmosphere becomes cooler
C: There is oxygen
D: it rains there
举一反三
- 10. Man can land on Venus only when_______. A: the algae have done their work B: the atmosphere becomes cooler C: there is oxygen D: it rains there
- Man can land on Venus only when_______.
- Professor Carl Sagan believes that Venus might house the people from the earth as long as ________. A: we fire the rockets containing algae into the atmosphere of Venus B: we change Venus temperature C: we make it possible to rain on Venus D: we change the atmosphere on Venus
- Only when the work is done ( ) be able to go back home.
- Who can be an idol according to the lesson? A: Anyone can be an idol wehn they have done something extraordinary, positive and helpful. B: Anyone can be an idol when they have become a super star. C: Only famous people can be idols. D: \