it is subject because teacher is a subject
Here is the chief administrator, he will solve our problems.
That way you know what kind of audience your writing for you can use different words with a lot more complexity. its completely different writing for kindergarteners and writing a paper for a college seminar
1) No its never good to give someone the cold shoulder
2) Add something interesting like a video or make a story (fictional would be good)
3) ..i think this is more of a personal question so you would have to choose this one
4) You could ask the person how there day is and ask them what they like to do to see if you have something in common
