Because of too many differences between the two sides, a lot of questions are still left .

发布时间：2020-08-15 02:13:38

Because of too many differences between the two sides,  a lot of questions are still left     .
A in the air      B on the air         C by the air      D through the air

网友回答

解析：本题考查词组搭配。In the air 意思是“（计划等）未决定的”；on the air 意思是“在广播中”；C、D不正确。根据句意“很多问题还未解决”，故A正确。
以上问题属网友观点，不代表本站立场，仅供参考！