pity you didn't attend Lucy's birthday party last night you

pity you didn't attend Lucy's birthday party last night you know the coming exam,i'm to ___it
A,do B,get C,put D,take
The place where the general had been buried was finally discovered,marked by ____alone on a small stone.
A,a 45-number B,a number 45th(th在45的右上角)
C,the number 45 D,the 45-number
-pity you didn't attend Lucy's birthday party last night
-you know the coming exam,i'm to ___it