5 sentences

1. 他们答应调查此事。

   tā​men dā​ying diào​chá cǐ​shì.

   They promised to investigate the matter.

   Source: CCMatrix

2. 我知道此事对你来说很难。

   wǒ zhī​dao cǐ​shì duì nǐ lái​shuō hěn nán.

   I know this is really hard for you.

   Source: OpenSubtitles

3. 此事说来话长。

   cǐ​shì shuō​lái​huà​cháng.

   It's a long story.

   Source: OpenSubtitles

4. 他们为什么做此事对我来说是个谜。

   tā​men wèi​shén​me zuò cǐ​shì duì​wǒ​lái​shuō shì ge mí.

   Why they did this is a mystery to me.

   Source: CCMatrix

5. 每位医生对此事的看法都略有不同。

   měi wèi yī​shēng duì cǐ​shì de kàn​fǎ dōu lüè​yǒu bù​tóng.

   Every doctor has a slightly different opinion on this matter.

   Source: CCMatrix