How to make sentences and groups in homework? Who wants to tell me something?

Dān xuě sāi jǐng]: In vain.

Stuff [sāi zi]: something that blocks the mouth of a bottle.

Insert [sài shàng]: Outside the edge.

Nasal congestion bí sāi: stuffy nose, stuffy nose.

Seine: A river in France.

Things [sāi man]: things.

(1) My brother blushed and didn't dare to lift his eyelids, just like a student who didn't prepare his homework and met the teacher's spot check.

(2) Suffering has become a lesson and an education for us. Making good use of this bitterness is cleverness.

(3) We should be grateful for the pain and frustration, which is our homework. We should train from it and then break through, so that we can really get rid of it.

(4) For ordinary people, the most important lesson in life is to learn to accept yourself.

(5) If you don't work hard at ordinary times, you will forget to eat and sleep and catch up on your homework when the exam is near.