frost

昨晚有霜冻。

There was a ___frost last night.

今天早上我醒来时，地面上覆盖着一层霜。

When I woke up this morning the ground was covered with ___frost.

昨晚有一场严酷的霜冻，损坏了庄稼。

Last night, there was a hard ___frost that damaged the crops.