Ⅰ. 根据句意及首字母提示完成单词(10分)
1. There are more than two hundred countries in the w_____.
2. He is swimming in the river like a f_____.
3. There are many d_____ kinds of plants in the world.
4. The child with the candy in the birthday c_____is lucky.
5. I think the i_____ to buy some flowers for your mother’s birthday is good.