7 sentences

1. 他在纸上钻了一个孔。

   tā zài zhǐ shàng zuān le yī gè kǒng.

   He punched a hole in the paper.

   Source: Dong Chinese Dictionary

2. 木工在木板上钻了一个圆孔。

   mù​gōng zài mù​bǎn shàng zuān le yī gè yuán kǒng.

   The carpenter drilled a round hole in the wooden board.

   Source: Dong Chinese Dictionary

3. 他用一把小锥子在皮带上扎了个孔。

   tā yòng yī bǎ xiǎo zhuī​zi zài pí​dài shàng zhā le gè kǒng.

   He used a small awl to poke a hole in the belt.

   Source: Dong Chinese Dictionary

4. 由于光线突然变暗，他的瞳孔不由自主地放大了。

   yóu​yú guāng​xiàn tū​rán biàn àn, tā de tóng kǒng bù​yóu​zì​zhǔ dì fàng​dà le.

   His pupils dilated involuntarily as the light suddenly dimmed.

   Source: Dong Chinese Dictionary

5. 蒋、宋、孔、陈是当时著名的四大家族。

   Jiǎng, Sòng, Kǒng, Chén shì dāng​shí zhù​míng de sì dà jiā​zú.

   The Chiang, Soong, Kung, and Chen families were the four prominent families at that time.

   Source: Dong Chinese Dictionary

6. 孔先生是这所学校最受尊敬的老师。

   Kǒng xiān​sheng shì zhè suǒ xué​xiào zuì shòu zūn​jìng de lǎo​shī.

   Mr. Kong is the most respected teacher at this school.

   Source: Dong Chinese Dictionary

7. 山坡上有三孔新挖的窑洞。

   shān​pō shàng yǒu sān kǒng xīn wā de yáo​dòng.

   There are three newly dug cave dwellings on the hillside.

   Source: Dong Chinese Dictionary