第20题: [单项选择]__________ ourselves from the physical and mental tensions,we each need deep thought and inner quietness. A. Having freed B. Freed C. To free D. Freeing 参考答案:C 答案解析:【解析】考查非谓语动词。题干意思是:为了使我们自己从句身体和心理的紧张中解脱出来,我们每个人都需要深度思考和内心的安宁。所填词做目的状语,应用动词不定式,故选C。