You can’t see the now for they are having a meeting at the moment.A. editor-in-chiefsB. by

问题补充：

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

答案：

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。