1 sentence

1. 令我百思不解的是他们为什么没有出现。

   lìng wǒ bǎi​sī​bù​jiě de shì tā​men wèi​shén​me méi​yǒu chū​xiàn.

   What puzzles me is why they didn't show up.

   Source: UM-Corpus: Spoken