暴风雨期间下着很大的冰雹。

It was ___hailing heavily during the storm.

突然开始下冰雹，我们不得不找地方躲避。

Suddenly, it started to ___hail, and we had to take cover.

在一些地区，冬季月份经常下冰雹。

In some regions, it ___hails frequently in the winter months.