Question

【题目】It was thirty years _______ he was invested as an outstanding alumnus to celebrate the 128th anniversary of the university.

A. as B. while C. before D. until

Answer 1

【答案】

【解析】C

试题分析： 考查连词。句意：过了三十年他作为一名优秀的校友出席大学128年校庆。It be 时间段+before，过了多少时间才。。，故选C项。