21 Ô 4. Activities (¡¨¡ÃÃÁ) : - Trick or treat. - Attending Halloween costume party. - Carving pumpkins into Jack-o-lantern. í × 5. Common sayings (¤Ò¾´ËÃͤÒÍǾÃ) : í Ù - Trick or treat - Happy Halloween