One possible version:
Good afternoon, teachers and students.I feel honored to make a speech here.The
title is “Be a Civilized Student, Construct a
Harmonious School”.
As everybody knows, civilized behaviours are
of great importance for a student.They not only show our
good qualities but also make ourselves enjoy the harmony of school life, in
which we can gain a better result of study.
How can we develop civilized behaviours? The
first important thing we should do is to be a student with good scores and a
student always ready to help people in need.Besides, we should keep
the school environment clean. Never destroy the plants in our school, such as
flowers, trees and grass. Most importantly, we should remember hard working and
obeying the school rules make up the most necessary civilized behaviours as a
student.
That’s all.Thank you!