He worked as an engineer in a small company with a low salary. He was quite satisfied with his job. (complex sentence)
【正确答案】：Although/ Though he worked as an engineer in a small company with a low salary, he was quite satisfied with his job.
【题目解析】：根据以上两个单句的关系，我们将其第一句处理为让步状语从句Although…或Though…，把第二句处理为主句。