I haven't written you for ages but I was very busy because of the exams at the University .
I haven't written to you for ages because I was very busy because of the exams at University .
I haven't written to you for ages because I was very busy because of the exams at University .
Improve the grammaticality of this sentence: I haven't written you for ages but I was very busy because of the exams at the University . Output: