我们四天行进了150英里。

We ___covered 150 miles in four days.

我怀疑自己一天内步行能走完60公里。

I doubt I can ___cover 60 kilometers on foot in one day.

这列高速火车可以在两小时内跑完两座城市之间的距离。

This high-speed train can ___cover the distance between the two cities in under two hours.