1. Stephen: Last summer I went through a training program and became a literacy volunteer. When I began to discover what other people's lives were like because they could not read, I realized the true importance of reading.

9．one，one of+名词复数表“……之一”：

8．with，介词“用，有”：

7．In，in this way是固定搭配，“用这种方法”：

6．Instead，“相反，而是”，表转折：

5．Although/ though，“虽然，尽管”表让步关系：

4．had made，　 由前文By the age of six可知, 此处应用过去完成时态。

3．were shown，考查动词的被动语态用法：

2．and，表并列关系：