Can you think of a situation in which the two ______ from each other.

Philosophical problems arise when people ask questions that, though very        , have certain characteristics in common.

You can see the stars on a clear night，but in the daytime theyare _______.

He was a(n) ___________singer until the age of 40, when he turned professional.

I must say, it’s a very     offer. The pay is higher and the working conditions are much better.