Hello Tom!Thank you for submitting your homework today. Kindly take note of the corrections that I made. Thank you! ^^

Tom: You must be conscientious, when you are in public venue.
Correct: You must be conscientious when you are in public place.
Explanation: You don't use a comma when you join two ideas with "when".


Tom: It is not simple matter. It must be deliberately considered.
Correct: It is not a simple matter. It must be deliberately considered.

Tom: Don't deplete what we have now. we must stack off some of them.
Correct: Don't deplete what we have now. We must stack off some of them.
Explanation: Always begin your sentence with a capital letter.

Tom: If you have a open-minded, People around you want to get along with you.
Correct:  If you have an open mind, people around you would want to get along with you.

Tom:Don'y be shy. anyone can make a mistake. so dont be depressed.
Correct:Don't be shy. Anyone makes mistakes so don't be depressed.