The people who knew him very well said that he was too naïve sometimes.Had he been older,he___1___less sympathetic.But what he had done proved that he was the person,loving life,also a hero who can help others out of trouble.___2___his timely arrival, the boy would have been drowned.That gained respects for him.
　　
    1.[a]might have been 
       [b]would be
　　[c]might be
       [d]had been

　2.[a]But for 
       [b]Even for
　　[c]Except for 
       [d]If not

1. 选[a]该题考察非真实条件的虚拟。在表示过去情况的虚拟条件句中，条件从句用了过去完成时形式，主句可用should(would/could/might)+have+过去分词的形式

2. 选[a]该题考察含蓄条件的虚拟。But for含义为“要不是”，用于此处可以表达假设条件，but for his timely arrival=If it had not been for his timely arrival或If he had not arrived on time.