2 sentences for 以至 (yǐ​zhì)

1. 他听得入了神，以至有人敲门都没听见。

   tā tīng de rù le shén, yǐ​zhì yǒu rén qiāo​mén dōu méi tīng​jiàn.

   He was so engrossed in listening that he didn't even hear someone knocking on the door.

   Source: Dong Chinese Dictionary

2. 从老师以至学生，每个人都参加了这次活动。

   cóng lǎo​shī yǐ​zhì xué​sheng, měi gè rén dōu cān​jiā le zhè​cì huó​dòng.

   Everyone, from the teachers to the students, participated in the activity.

   Source: Dong Chinese Dictionary