The test not only helps make our _____ acquired knowledge permanent, but also enables us to find out what needs to take more time to improve.

It is one thing to enjoy listening to good music, but it is      another to play it well yourself.

The problem is _____ difficult for me _____ solve.

--- Do you think that the 11th Chinese National Games were a success ? --- Yes, ___! It couldn’t be ____ .

I don’t want to read all these old newspapers, please tell me where the __ ones are.