2 sentences

1. 这项研究耗时五年才完成。

   zhè xiàng yán​jiū hào​shí wǔ nián cái wán​chéng.

   This study took five years to complete.

   Source: Dong Chinese Dictionary

2. 这项理赔耗时三个月才最终完成。

   zhè xiàng lǐ​péi hào​shí sān gè yuè cái zuì​zhōng wán​chéng.

   This claim settlement took three months to finalize.

   Source: Dong Chinese Dictionary