Yesterday afternoon Frank Hawkins was telling me about his experiences as a young man. Before he retired, Frank was the head of a very large business company, but as a boy he used to work in a small shop. It was his job to repair bicycles and at that time he used to work fourteen hours a day. He saved money for years and in 1958 he bought a small workshop of his own. In his twenties Frank used to make spare parts for aeroplanes. At that time he had two helpers. In a few years the small workshop had become a large factory which employed seven hundred and twenty-eight people. Frank smiled when he remembered his hard early years and the long road to success. He was still smiling when the door opened and his wife came in. She wanted him to repair their grandson's bicycle!

1)  It was his job to repair bicycles - 为什么不是 It was his job repairing bicycles =  Repairing bicycles was his job. 理由是：动名词表示经常性，而不定式还有将要的，一次性的意思。

2)  Frank smiled when he remembered his hard early years. 我的分析和疑惑：when=after动作remembered先发生，然后再smiled，我感觉根据课文语境，是否用进行时更好？即Frank smiled when he WAS REMEMBERING his hard early years 呢？

在回忆的过程中（过去进行时），smiled是否更合理呢 ?