This question tests your understanding of verb tenses and passive voice in English grammar. The blank (123) requires the correct verb form to complete the sentence meaningfully and grammatically.

The most suitable option is "was offered". This is because the sentence describes a past action where the subject ("he") received the action (the job). "Was offered" is the correct past simple passive form, indicating that someone offered the job to him in the past.

Why the other options are incorrect:

"offer": This is the base form of the verb and is used for the present tense. It does not fit the past context of the sentence.

"offered": This is the simple past tense but in the active voice (e.g., "He offered me a job"). Using it here would imply that "he" did the offering, which changes the intended meaning that he received the offer.

"offering": This is the present participle form. It is used to form continuous tenses (e.g., "is offering") or as a gerund. It is grammatically incorrect in this blank.

Related Concept: Passive Voice

The passive voice is used when the focus is on the action and the object of the action, not on who performed the action. The structure is:

$\mathrm{object}+\mathrm{be}+\mathrm{past}\mathrm{participle}+\left(\mathrm{by}\mathrm{subject}\right)$

For the simple past tense, the verb "be" becomes "was" (for singular) or "were" (for plural).

Formulae (Rules)

Active to Passive Conversion:

Active: Subject + Verb + Object

Passive: Object + (be + past participle) + (by + Subject)

Example: "The company offered him a job." (Active) becomes "He was offered a job (by the company)." (Passive)