【问题】 They always their duties faithfully. A. extend B. integrate C. promote D. perform

They always their duties faithfully. A. extend B. integrate C. promote D. perform

正确答案:D

题目解析:本题出自兰州交通大学,兰州交通大学-土木工程-大学英语3,由丰阳塔题库搜集整理。