surprise、time可数吗?可数就加a______long time he stayed in the reading ro_英语解答

surprise、time可数吗?
可数就加a
______long time he stayed in the reading room.
A.What B.What a C.What was D.How
选什么

人气：162 ℃　时间：2020-02-05 23:49:08

解答

不可数
A