高等继续教育 / 电子商务英语
正确率:100%
题型描述: 单选题
It was in 2005 ______we began to introduce this new technique into our company.
A.then
B.that
C.which
D.when
It was in 2005 ______we began to introduce this new technique into our company.
A.then
B.that
C.which
D.when
参考答案: