单选题 If we ______ earlier, we would not have missed the bus.
A) left C) have left
B) had left D) would have left

【正确答案】 B
【答案解析】本题考点是虚拟语气。本句表示与过去事实相反，主句用would+have+过去分词，从句用had+过去分词。本句大意：如果我们早点离开，我们就不会错过那班车了。