Man can land on Venus only when_______.
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
- 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
- If only the nose gear can be extended, pilots can land on the nose gear.
- The exporter can receive the payment only when( ).
- _____ the people have become masters of their own country that science can really serve the people. A: Only then B: It is only then C: Only when D: It is only when