It was a breezy Monday morning. My classmates and I were having English lesson.
Every classmate of hers was frightened
Correct but very awkward, I suggest:
All her classmates were frightened...
After that, lesson resumed
After that, the
P.S. When you post questions, can you please tag them "english", and when they are answered can you please select an answer? This way, they are easier to find and it's easier to keep track of what questions still need answers.