The flood this summer caused serious _______________ to the crops in Northeast China.

After three months, these young students finally became used to the ______ of life in a big city abroad.

Having a fever is the ______________ of SARS.

 Due to the widespread ________ of this medical technology，more diseases can be discovered and treated at an early stage.

Clothes are just a ________ of money, but one’s real life value lies in his knowledge, morality and quality.