Ⅰ. 根据句意及首字母提示完成单词（5分）
1. I often go to bed at nine o’ c__________ in the evening.
2. The old man is p__________ sixty years old.
3. I like drawing, so my favourite subject is a__________.
4. This question is not easy. It’s very d__________.
5. China is a great country with a long h__________.
