我们需要遵循议程，否则会议会拖得太久。

We need to ___keep ___to the agenda or the meeting will take too long.

我希望你能紧扣主题！

I wish you'd ___keep ___to the point!

她一直走主干道，天黑前就到家了。

She ___kept ___to the main roads and was home before dark.