New digital mobile phones definitely produce less radiation, but that doesn’t         mean that they should be used without caution.

Before building a house, you will have to _________ the government’s permission.

It took the scientists seven days to________Takla Makan________“the sea of death”.

The fact that she never apologized ____a lot about what kind of person she is. 

He's _____ drink and never does a stroke of work.