Ididn’tknow_____

发布时间：2020-07-11 12:36:49

I didn’t know  ________.













A.when did the plane take off












B.when the plane took off











C.when the plane takes off











D.when does the plane take off

网友回答

B解析特殊疑问词作宾语从句，将特此作为连接词，后接陈述句语序。故选B
以上问题属网友观点，不代表本站立场，仅供参考！