yǐ / qián / nóng / cūn / cháng / yòng / dēng / yóu / diǎn / dēng / hòu / lái / cái / zhú / jiàn / gǎi / yòng / diàn / dēng

以前农村常用灯油点灯，后来才逐渐改用电灯。

In the past, rural areas often used lamp oil for lighting, and only later gradually switched to electric lights.