–The new museum of art is an unusual ______.--But it is designed by a very young architect.

It is said that dogs will keep you _________for as long as you want when you are feeling lonely．

The government is aiming to reduce the unemployment, but it’s quite _______ to have a job at all these days. 

Many scientists have believed that there may be a _________of life on the Mar．

He is a man of ____ and he had a lot of interesting ____ in his life.