用所给的词组填空 knock at/on celebrate Chrstmas play a trick/joke on take him for a walk dress up trick or treat Children's Day Teachers' Day your favourite festival paint our faces 1. The children like _______________ others. 2. How do the people _______________? 3. What is your _______________? 4. You can _______________ after lunch. 5. At Halloween we often _______________.