她每月按时偿还学生贷款。

She ___repays her student loan on time every month.

他送了一份礼物给邻居以回报他们的帮助。

He gave his neighbors a gift to ___repay them for their help.

学习这门课程虽然很辛苦，但最终会有回报。

Studying this course is hard work, but it ___pays off in the end.