单选题 Mr. Smith left for London this morning. I had thought he ______ until next Monday.
A. isn't going B. wasn't going C. won't going D. hasn't gone

【正确答案】 B
【答案解析】[解析] 谓语动词的时态题。本题表示“我过去以为”的内容，所以谓语动词应用过去将来时。