You should use the form "Ud" when speaking ti the principal of your school.
In the U.S the most popular cities are...
New york, Los Angeles, Chicago, Houstoun, Phoenix, Philly, San Antonio, San Diego, Dallas, San jose.
Temperatures are always changing so you must do that.
Cada parte de América tiene diferentes climas, algunos calientes, algunos fríos y otros simplemente cálidos.
The rest you have to do all on your own, hoped this helped
We need the picture to respond.
