Yes! You use the passive voice correctly

1. You've got many problems that you need to face to. - You've got many problems that you need to face. - just eliminate the "to" here. This sentence sounds natural, but you could also say "You need to face your problems" 2.There are so many things need to be done before in the face of the next challenge. - There are so many things that need to be done before facing the next challenge. 4. He mocked her deliberately in order to make her cry. - Sounds fine! You could also just say "to make her cry" 5. He mocked her on purpose in public in order to make her cry. - Same as above. I would recommend removing "in order" here, just to make it a little more smooth/natural/less wordy 6. He was fired at the discretion of his boss. 7. He was fired at the decision that was made by his boss. - Sentence 6 sounds a better. Could reword it to say "The boss made a decision to fire him", or "He was fired because of the boss's decision" 8. He was alleged of killing someone two days ago in the forest. - I could be wrong here. But I would say "It was alleged that he killed" or "He allegedly killed" I hope this was helpful!

https://www.echineselearning.com/blog/ben-niao-xian-fei-clumsy-birds-have-to-start-flying-early-beginner This link directs you to a page where someone has translated this idiom/fable. Your wording is completely understandable, but it is a little unnatural. I am apprehensive to make corrections, because I'm not sure it would "stay true" to the fable. However, I will just discuss the grammar of the phrases. A Chinese fable: Son: There're three kinds of clumy birds. - "There are three kinds of clumsy birds" One is fly earliest than others; the other is too lazy to fly. - I would say "One flies earlier than the others. One is too lazy to fly" or "Another is too lazy to fly". I wouldn't use "the other" here because you still have another bird to mention. Mum: And the third? - Great! Son: And the third, which is the most irritating: they can't fly, so they lay eggs to force their offspring to do their job. - There are a few ways you could write this, but I wouldn't use a colon (:). You could make it a long sentence with a lot of commas, but I might break it into two sentences - "And the third type of bird is the most irritating. They can't fly, so...."

Either is okay! You can say "at" or "with" in the question or answer and it sounds natural.

I agree that "worn" isn't a common description for facilities in terms of places. You could say machines/equipment is worn or highly used, especially referring to equipment in a gym. I can see where someone would say "our workout facilities need updated". "Facilities" can be used as a general term referring to things as part room/service [our kitchen facilities/gym facilities/etc] A : I suggest substituting some new facilities for the worn ones. - I would probably re-word this to say "We need update the facilities because they are highly used/outdated" or "We need to upgrade our facilities and substitute the worn equipment with new equipment" B : I suggest replacing some new facilities with the worn ones. - Using "with" in this order changes the meaning to [make the facilities worn], so I wouldn't use this.

Remember: Remember is an verb/action - You need to "remember" a date, list, memory, etc. - "I need to remember to send that email", "I just remembered I need to send that email" Remind: Is also an action/verb, and I agree that it is usually used in combination with an object/event - "That reminds me of this", but can also be a request to remember something "Remind me to send that email" Recall: Kind of "retrieving" or "remembering" information - "Can you recall the names of 50 U.S. states", "I recall you once said..."

You can use "a guy friend" or just "friend". Its common to not specify male/female/etc. Younger guys (especially "frat" guys) may use "bro", but that's much more casual.