Guo Yang and Steven 1. (be) good friends. Guo Yang 2. (like) sports very much. He 3. (play) ping-pong very well. Last Sunday, They 4. (go) to a shop to 5. (buy) a new ping-pong ball. Guo Yang 6. (teach) Steven how to play ping-pong. Steven 7. (think) it would be easy. But it 8. (is) difficult, he 9. (play) hard. They10. (have) fun together.