James has just arrived.but i didn't know he 【 】until yesterday.

问题描述:

James has just arrived.but i didn't know he 【 】until yesterday.
A will come B was coming C had been coming D came 求明确解释.

正解B.
我昨天才知道他要来,他刚到,说明昨天还没到,was coming 表示过去将要发生的动作,符合题意.