搜题
王老师:19139051760(拨打)
题目  更新时间:2023/4/3

The thirty-story building is one of the most challenging engineering projects they have ever ________ .
A. undergone
B. underweight
C. understood
D. undertaken

D

出自: >>
继续教育学院

王老师:19139051760(拨打)