2 sentences

1. 他一看到老师进来，连忙站了起来。

   tā yī kàn​dào lǎo​shī jìn​lái, lián​máng zhàn le qǐ​lai.

   As soon as he saw the teacher come in, he hurriedly stood up.

   Source: Dong Chinese Dictionary

2. 看到老师走过来，他连忙趋前请教几个问题。

   kàn​dào lǎo​shī zǒu guò​lái, tā lián​máng qū qián qǐng​jiào jǐ gè wèn​tí.

   Seeing the teacher walking over, he hurriedly stepped forward to ask a few questions.

   Source: Dong Chinese Dictionary