Do you know that a living cell can be       for a thousand years if the temperature is right?

I have had my bike ___ , and I'm going to have somebody ___ my radio tomorrow. 

From facts, scientists have        that more energy is being absorbed from the sun, throwing the earth’s energy “out of balance”.

–Have you ____some new ideas？-Yeah. I’ll tell you later.

His radio is a very old one. It sometimes works and sometimes it_______