问题详情:
I was about to inform you of the sudden change ______an unexpected visitor came.
A. because B. before C. when D. unless
【回答】
C
知识点:连词
题型:选择题
问题详情:
I was about to inform you of the sudden change ______an unexpected visitor came.
A. because B. before C. when D. unless
【回答】
C
知识点:连词
题型:选择题