3 sentences

1. 原先生是我们的领队。

   Yuán xiān​sheng shì wǒ​men de lǐng​duì.

   Mr. Yuan is our team leader.

   Source: Dong Chinese Dictionary

2. 旅游团的领队正在清点人数。

   lǚ​yóu​tuán de lǐng​duì zhèng​zài qīng​diǎn rén​shù.

   The tour group leader is counting the number of people.

   Source: Dong Chinese Dictionary

3. 他将领队参加下个月的登山活动。

   tā jiāng lǐng​duì cān​jiā xià gè yuè de dēng​shān huó​dòng.

   He will lead the team in next month's mountain climbing activity.

   Source: Dong Chinese Dictionary