Question

【题目】James has just arrived, but I didn't know he _______ until yesterday.
A.will come
B.was coming
C.had come
D.came

Answer 1

【答案】B
【解析】句意：James刚到，直到昨天我才知道他要来。didn't know要求后接表示“过去将来”的动词，故B项正确。