He ......himself a stiff drink before making his statement to the police officer.

Option 2: poured ✅

The phrase "poured himself a stiff drink" is a well-known English expression. It means he made himself a strong alcoholic drink by pouring it from a bottle into a glass. A "stiff drink" is a drink with a lot of alcohol in it. People often say this when someone needs courage or wants to calm their nerves before doing something difficult — like making a statement to the police!

Example: "After the long, scary day, Dad poured himself a stiff drink and sat down."

Let's confirm by checking the other options:

Option 1: threw → "Threw" means to toss or fling something. You don't "throw yourself a drink" — that's not how we talk about preparing a drink. ❌

Option 3: filled → We say "filled a glass" but not "filled himself a drink." It's not a natural English expression. ❌

Option 4: sipped → "Sipped" means to drink slowly in small amounts. It describes how you drink, not how you prepare a drink. You can't "sip yourself a drink." ❌