If English is not your first language, you may have excellent reading comprehension but difficulty when writing “normal” sentences. On the other hand, I’ve seen people express themselves quite well in technical context, when numbers and keywords are more important than literary flourishes.
Plus, OP expressed himself perfectly clearly, IMHO.
Zhaozehao I urge you not too listen too any ignorant and bitter dudes / dudesses who think they can judge someones comprehension in a language just because they read a one liner.
I apologize…that was poor form on my part. Must have been a rough day in the office. Your English is infinitely better than my Chinese. Best of luck to you and I hope you passed Level I.