The series of lectures ___delivered
The series of lectures ___delivered
Explanation
Was is a past tense indicative form of be, meaning “to exist or live,” and is used in the first person singular (I) and the third person singular (he/she/it).
Was is a past tense indicative form of be, meaning “to exist or live,” and is used in the first person singular (I) and the third person singular (he/she/it).