Rewrite the following question in reported speech, using question words before to-infinitives. ----- Nội dung ảnh ----- 1. "What should we do to help preserve our traditional handicrafts?" 2. "They didn't know." 3. "Where can I buy affordable handmade products?" 4. "How should we find a support center for the homeless?" 5. "When should we start recycling our plastic water bottles?" 6. "Mom, who should I call upon arriving at the airport?" 7. "Should I join a volunteering programme this summer?" 8. "What should we do to help those disadvantaged children?" 9. "When should I apply to become a community helper?" 10. "How should I introduce some Vietnamese specialty food to the foreigners?"