I always think of books with unutterable feelings, being deeply indebted to them, as I am, for the warmth they have brought me.
A.preferred
B.mixed
C.profound
D.dissatisfied
参考答案:C
解析:[分析] 形容词应用unutterable 非言语所能表达的,十足的;本句意为:我对书籍总是怀有深厚的感情;由于书籍为我带来的温暖,我对它们有着深深地感激之情。A. preferred 首选的,优先的; B. mixed 混合的;C. profound 深刻的,意义深远的,造诣深的;D. dissatisfied 不满意的,不高兴的;因此C为答案。