he lives in a rich family, he started from the lowest position as an ordinary worker to make his living.
A. While
B. Unless
C. As
D. Since
网友回答
(答案→)A. While
B. Unless
C. As
D. Since
解析：
根据句意：尽管他生活在富裕的家庭，但是他还是愿从地位低微的普通工人做起来谋求生计。
while尽管，然而，表转折 unless 除非 as因为、尽管 since因为。故选A