The stronger the ___________ is, the more quickly a person will learn a foreign language. That is to say, it is up to whether he has an interest in the foreign language. 

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

Scientists have achieved a major ___ in the search for a cure for cancer, ____ is good news for those who suffer from cancer.

Radar enables the pilot of an airliner to take off, fly and land in _____.

For the sake of her daughter’s health, she decided to move to a warm ______.