4 sentences

1. 这是他第七次参加比赛。

   zhè shì tā dì​qī cì cān​jiā bǐ​sài.

   This is the seventh time he has participated in the competition.

   Source: Dong Chinese Dictionary

2. ‎我会是第七个吗？

   ‎ wǒ huì shì dì​qī gè ma?

   Am I to be the seventh?

   Source: OpenSubtitles

3. 你在第七章学到什么了吗？

   nǐ zài dì​qī zhāng xué​dào shén​me le ma?

   Did you learn anything in Chapter 7?

   Source: OpenSubtitles

4. 翻开第七张牌。

   fān​kāi dì​qī zhāng pái.

   Turn over the seventh card.

   Source: OpenSubtitles