Chuyển sang dạng đúng của từ 1. English is the ................ language in the United States. (NATION) 2. Earth Hour is a ........... event organized to raise people's awareness about the need to take action on climate change. (WORLD) 3. Solar energy, wind power and water power are .............. sources of energy. (ALTERNATE) 4. The clothes we wear, like a ............... language, can give out message. (SPEAK) 5. His health was seriously affected and he suffered from constant ............... . (SLEEP) 6. Thank you very much for your kind ........... . (HOSPITABLE) 7. Luckily, many people escaped from the fire in Carina blocks .............. . (HARM) 8. There is no easy ........... to this problem. (SOLVE)