_____ ourselves from stress, we need deep thought and inner quietness.

Now more and more people prefer _____ to_____ inorder to reduce the air pollution.

the heavy mudslide happened in Sichuan, hundredsof newspaper reporters were sent to ____ the natural disaster.

,the more quickly he will learn a foreign language

Modern China is experiencing a completely new period ________ respect for science and creativityhas become the guiding principle of society.[ ]