"Antihealthy" is not a correct word.
The proper term is "unhealthy."
So the sentence should be "An unhealthy person often falls sick."
When comparing two actions (you go vs. you reach), use comparative form: "faster" not "fastest".
"Fastest" is superlative and used when comparing more than two.
The phrase "in get" is incorrect; it should be "to get" to show purpose or intention.
Correct sentence: "I have always looked for ways to get things done in time."
"By profession" is the correct phrase used to indicate someone's official job or career.
"On literature" is appropriate when referring to spending time focused on a subject or activity.
Interrupted means رکاوٹ
Allow means اجازت دیں
Enthusiastic means پرجوش
Interested means دلچسپی
Promising means مستقبل کی کامیابی یا صلاحیت کی علامتوں کو ظاہر کرنا
Unpromising means کامیاب ہونے یا نتیجہ خیز ہونے کا امکان نہیں ہے
The preposition "on" is used when something is on the surface or physically upon something.
Monkeys sit or move on trees, so "on the tree" is correct.