Jane was a very smart young girl so she was quite used to her friends their admiration

问题补充：

Jane was a very smart young girl, so she was quite used to her friends their admiration for her.

A. showed

B. show

C. showing

D. to show

答案：

A. showed

B. show

(答案→)C. showing

D. to show

解析：be used to doing sth. 意为“习惯某事或习惯做某事”，to 为介词，后接名词、代词和动词-ing 形式。