You can’t see the now for they are having a meeting at the moment.
A. editor-in-chiefs
B. by an hour
C. by hour
D. each hour
网友回答
A. editor-in-chiefs
B. by an hour
(答案→)C. by hour
D. each hour
解析：本题考查名词。by an hour一个小时；by hour以小时计；each hour每一小时。句意：你现在不能见他们，他们要在主编会议室开一个小时的会。