3 sentences for 乎 (hū — question particle)

1. 学而时习之，不亦说乎？

   xué ér shí xí zhī, bù yì yuè hū?

   Is it not a pleasure to learn and practice what you have learned from time to time?

   Source: Dong Chinese Dictionary

2. 王侯将相宁有种乎？

   wáng hóu jiàng xiàng nìng yǒu​zhǒng hū?

   Are kings, nobles, generals, and ministers born into their ranks?

   Source: Dong Chinese Dictionary

3. 子曰：学而时习之，不亦说乎？

   zǐ yuē: xué ér shí xí zhī, bù yì yuè hū?

   Confucius said: 'To learn and practice what you have learned at the right time—is it not a pleasure?'

   Source: Dong Chinese Dictionary