1 sentence

1. 开学初，老师会对学生进行一次摸底考试。

   kāi​xué chū, lǎo​shī huì duì xué​sheng jìn​xíng yī cì mō​dǐ kǎo​shì.

   At the start of the semester, the teacher will give the students a diagnostic test.

   Source: Dong Chinese Dictionary