2. It can be deleted without changing the meaning.

3. Alma mater: Today I am proud of my alma mater, and tomorrow my alma mater will be proud of me!

Teacher: Teacher-on my dark road of life, you lit the brightest lamp for me;

Teacher-you are the guide on my misty life;

Teacher-you pointed out the direction for me in my rough life;

Teacher-you gave me a pair of powerful wings, let me travel in the world of knowledge!