As known by all Chinese students, we are required to get to the playground before 6:45 to do Morning Run.

Add a space after each comma and period. This is much more important in English than in Chinese.

As I (had) stayed up late the night before, keeping awake becoames a challenge for me.

Then, homeworks are was assigned to us and soon ithey piled up into a huge stack.

“Homework” is uncountable.

Swainging among the options of "whether to do my homework",…

Merge this with the next sentence.

I finally surrendered to my inner voice, which tellsold me to relax.

So I takeook out my mobile and began to play tetris.

I was getting really exhausted from the beginningstart of the day.

As known by all Chinese students, know, we are required to geto to the playground before 6:45 to dgo Mfor a morning Rrun.

Active voice not passive sounds better for As all Chinese students know

As I stayed up late the night before,keep staying awake becomewas a challenge for me.

哈哈 relatable
Stay awake sounds more natural than keep awake

Then, homeworks a were assigned to us and soon they piled up into a huge stack.

Homework is a concept on its own so singular is enough

I've made all my efforts to respond tocomplete them until finally they amount became uncontrollable.

It's better to say complete homework, rather than respond, respond it better for calls/messages/emails instead of tasks

Swang amongI debated between the options of "whether to dodoing my homework",

Ior finally surrendereding to my inner voice, which tells me to relax.

So I takeook out my mobile and began to play tetris.

The problem lies in the fact that gaming is not a sustainable solution.

At least it's not league of legends!

While relieving me from stress caused by study,so pleasurable activity still cannot solve my fatigueAlthough it helps with the stress caused by studying, hobbies still cannot help me to stay awake/solve the problem of me being so tired.

Hobby is better than pleasurable activity