being は省略可能だから
_____ in haste, the handout for the seminar has a few mistakes.


1.Written
2.Have written
3.Writing
4.To have written


答え
1

As the handout was written in haste を分詞構文で表すと、being written in haste. being は省略可能だから、writtenになります。

【訳】
急いで書かれたのでセミナーの資料は数個の間違いがあった。