他在建筑工地工作了几个月。

He ___worked at construction sites for a few months.

他在二手市场倒卖球鞋，靠低买高卖赚取差价。

He ___flipped sneakers in the second-hand market, buying low and selling high for profit.

公司将网站设计工作外包给了一家专业机构。

The company ___outsourced the website design to a specialized agency.