完形填空。阅读下面短文，从短文后所给各题的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
Mr. Glen is a millionaire. Five years ago, after returning from abroad to his motherland, he 1 his small company. Speaking of success, Glen often tells us a story about his extra expensive “school” fee. He always 2 his success to it.
