Some experts think that language learning is much ___ for children as their tongues are more flexible.

While the government says there is a(n) ________supply of houses，prices of apartments have been going up these years.

They help and understand each other and never quarrel, thus creating a(n)_______ relationship.

People can accept the fact that prices tend to rise year by year but at a(an) ______ rate.

—Minister, are you satified with the performance of the Chinese athletes in Beijing Olympics? ---Yes, it couldn't have been _____.