When to our school, the new study methods are popular with all the students.A. to introd

发布时间：2020-08-17 13:55:59

When      to our school, the new study methods are popular with all the students.
A. to introduce
B. introduced
C. introducing
D. to be introduced

网友回答

A. to introduce
(答案→)B. introduced
C. introducing
D. to be introduced
解析：非谓语动词,过去分词表被动。
以上问题属网友观点，不代表本站立场，仅供参考！