He _______ into the restaurant when the waiter was having dinner.
Correct Answer: GET
Knowledge: Past continuous tense
Past Continuous Tense: S + was/ were + V-ing
To describe an action that was in progress (past continuous) when another action interrupted (past simple)
Formula: S + V_ed/V column 2 + when + S + was/were + V_ing
Translated: He went into the restaurant while the waiter was having dinner.