Ⅰ. 从方框中选词并用其适当形式填空
spare, planet, hear, build, model
1. The Earth is one of ________ and it goes around the sun.
2. The man likes reading and playing chess in his ________ time.
3. A new airport will be ________ in the city next year.
4. My friend Jerry is good at making ________ planes.
5. —Have you ever ________ of the farmer singer Zhu Zhiwen?
—Yeah,he appeared on CCTV 2012 Spring Festival Gala.