试题题干
Word Formation
Complete the following sentence with the proper form of the word in the bracket.
(achieve) I felt a great sense of 
when I reached the top of the mountain.
参考答案
试题解析
此处缺少名词。
of后接名词，所以变achieve为名词名词achievement，-ment 名词后缀。sense of achievement，成就感。
句意：当我到达山顶的时候我非常有成就感。