问题详情:
Helen _______ her key in the office, so she had to wait until her husband came back home.
A. has left B. had left C. had been left D. having left
【回答】
B
知识点:过去完成时及其被动式
题型:选择题
问题详情:
Helen _______ her key in the office, so she had to wait until her husband came back home.
A. has left B. had left C. had been left D. having left
【回答】
B
知识点:过去完成时及其被动式
题型:选择题