2 sentences for 董 (dǒng)

1. 他作为这所中学的校董，捐赠了许多书籍。

   tā zuò​wéi zhè suǒ zhōng​xué de xiào dǒng, juān​zèng le xǔ​duō shū​jí.

   As a trustee of this middle school, he donated many books.

   Source: Dong Chinese Dictionary

2. 由于主管休假，这些账目暂由他负责董理。

   yóu​yú zhǔ​guǎn xiū​jià, zhè​xiē zhàng​mù zàn yóu tā fù​zé dǒng lǐ.

   Since the supervisor is on leave, he is temporarily in charge of managing these accounts.

   Source: Dong Chinese Dictionary