Tutor is someone who helps someone in a particular study but doesn't have a degree per say. It can be a side job for some, and not necessarily associated with a school. Teacher is someone who has qualifications to teach a classroom full of students and is a part of a facility of learning in some way. Husband is a man in a couple that is married. Spouse is referring to the other person in a marriage. A husband can be a spouse but a spouse is not always a husband. Spouse can be the wife too.

"Wound" means to injure someone. I think that the sentence meant to say something different. Instead I think that it meant to say "a well rounded expert" meaning that he knew a lot about what he was doing and the job he has.

I know it is a little late but it means that you arrived in Boston and you did not feel sleepy. "Energy to spare" just means that you could do more physical activity before requiring a nap and or sleep.

Hairband. I usually buy them in the store though. Here is a link to some on Amazon. http://www.amazon.com/Scunci-Effortless-No-damage-Elastics-Assorted/dp/B001T8QJM0/ref=sr_1_7?s=beauty&ie=UTF8&qid=1456303640&sr=1-7&keywords=hairband Just make sure in the product description it says metal free. The ones with metal are not as good and hard on hair.

"Get more exercise" is a comparative statement meaning that if you rode your bike to work you would get more physical activity than using some sort of automotive transportation.