You’ve just missed your ______, and you will have to wait for the next round.

He spent a large ___ of money on his books.

Quite a few employees’ payments are cut down and barely cover their household ________ due to the serious economic crisis.

The system has been designed to give students quick and easy        to the digital resources of the library .

In common with many people，I like white colour as it is a ________of purity.