题目内容：

阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。

The word “diary” comes from the Latin word “diarium”, 1. means “daily allowance”. It refers to a book for writings by date. And it 2. (use) for business notes, planning activities, keeping track of scheduled appointments, or documenting 3. has already happened. Some doctors suggest that 4. (write) in a diary is a good form of self-study.