I think the first sentence is correct, and you should remove the word have in the second
1. Be professional don’t give half answers and act unprofessional
2. Don’t see to eager or over excited sound enthusiastic but not to crazy
3. Act like you want the job and are really interested because they can hire people who are way more interested in getting a job than you
I hope this can help you
Yes looks like it is correct grammar
1. The Eiffel Tower is so beautiful at night. We will have visited by the day we arrive there.
the action or process of reasoning systematically in support of an idea, action, or theory.