Fill in the blanks :
1. When ten centuries, i.e. 1000 years are gone, a ………………… is completed.
2. In history books also, a chain of events that follow one after the other is presented in a …and ……………. manner.
3. ………. means in the year of Our Lord.
4. The Christian or Common Era began in the memory of ………….
5. The first century of this era is written as …….. CE or AD.