单选题 Terry would certainly have attended the meeting ______.
   A) if he didn't get a flat tire
   B) if he had not had a flat tire
   C) if the flat tire didn't happen
   D) if the tire did not flatten
【正确答案】 B
【答案解析】主句中谓语动词用了would+have+attended，由此可以推断出是表示过去情况的虚拟条件句，故从句中谓语动词形式为过去完成式。