Is ____ necessary to complete the design before National Day?

I hate _______ when young people speak to the elderly in a rude way. 

—How long are you staying there?
— _____depends.

______was known to them all that William had broken his promise______ he would give each of them a gift.

—When can we come to visit you?
—Anytime you feel like                 .

 The CDs are on sale！Buy one and you get ______ completely free.

In the Spring Festival, Jonny sent each of his classmates a card with best wishes, but he received ________.

The information on the Internet gets around much more rapidly than ____ in the newspaper.    

I feel _____ no use ____ so much money on that project.

Mr Smith was a strict headmaster, but ______ all the teachers and students in our school showed respect for.