Sentence 1: I came to school drowsy since I spent all night studying for exams. 
 Sentence 3: We decided to hang out around campus before going home 
 Sentence 4:  After the school closed, I said goodbye to everyone 
 Sentence 5:  We took our phone numbers down to arrange another meet up 
 Option 1: After taking the exams, I decided to get together with a few friends. 
 Option 2: As soon as the exam was over, I went home and slept for 8 hours.