3 sentences

1. 前几天发生了一件怪事。

   qián jǐ tiān fā​shēng le yī jiàn guài​shì.

   Something strange happened a few days ago.

   Source: OpenSubtitles

2. 你想听件怪事吗？

   nǐ xiǎng tīng jiàn guài​shì ma?

   You want to hear something weird?

   Source: OpenSubtitles

3. 真是件怪事，我的钥匙明明放在这儿的。

   zhēn shì jiàn guài​shì, wǒ de yào​shi míng​míng fàng zài zhè​r de.

   It's a strange thing; I clearly put my keys right here.

   Source: Dong Chinese Dictionary