–Did you ask the guard what happened?--Yes, he told me all he knew.A. about whichB. which

发布时间：2020-08-16 20:35:51

–Did you ask the guard what happened?
--Yes, he told me all      he knew.
A. about which
B. which
C. that
D. what

网友回答

A. about which
B. which
(答案→)C. that
D. what
解析：
此题考查定语从句，先行词是all，并且在从句中充当宾语故用引导词that。
以上问题属网友观点，不代表本站立场，仅供参考！