从方框内选出合适的单词并用其适当形式填空。 December; poem; join; bear; question; snow; move; at the age of 1. The boy could ride a bike _____ thirteen. 2. On July 1st last year,he _____ the chess club. 3. My father was _____ in 1956. 4. Don't you know the answer to the _____? 5. It often _____ in winter in North China. 6. The family _____ to Beijing in 1998. But now they live in Shanghai. 7. I enjoy Li Bai's _____ very much. 8. _____ is the last month of a year.