3 sentences

1. 就在这时，门突然开了。

   jiù zài zhè​shí, mén tū​rán kāi le.

   Just at that moment, the door suddenly opened.

   Source: Dong Chinese Dictionary

2. 他们来这时，我只有九岁。

   tā​men lái zhè​shí, wǒ zhǐ​yǒu jiǔ suì.

   I was nine when they got here.

   Source: OpenSubtitles

3. 这时我才知道真相。

   zhè​shí wǒ cái zhī​dào zhēn​xiàng.

   That's when I learned the truth.

   Source: OpenSubtitles