2 sentences for 聪明 (cōng​ming — acute)

1. 爷爷虽然年纪大了，但依然耳目聪明，听得见远处的声音。

   yé​ye suī​rán nián​jì dà le, dàn yī​rán ěr​mù cōng​ming, tīng​de​jiàn yuǎn​chù de shēng​yīn.

   Although Grandpa is old, his hearing and sight are still sharp; he can hear sounds from far away.

   Source: Dong Chinese Dictionary

2. 爷爷虽然已经是九十岁的高龄，但依然耳目聪明，视力极好。

   yé​ye suī​rán yǐ​jīng shì jiǔ​shí suì de gāo​líng, dàn yī​rán ěr​mù cōng​ming, shì​lì jí hǎo.

   Although my grandfather is already ninety years old, his hearing is still sharp and his vision is excellent.

   Source: Dong Chinese Dictionary