学校董事会决定延长学年。

The school board decided to ___lengthen the school year.

为了减少时差反应，他们延长了在东京的转机时间。

To reduce jet lag, they ___lengthened their layover in Tokyo.

随着夏季临近，白天逐渐变长。

As summer approaches, the days gradually ___lengthen.