用所给单词的正确形式填空 。

1. Jack has a _______ (头痛) today. He doesn't feel very well.

2. December is the _______ (十二) month of a year.

3. A strong wind is blowing from the _______ (东北).

4. John's bike is _______ (坏了). He needs a new one.

5. My brother grows a lot of_______ (蔬菜) in the garden.

谈谈社会语言学与方言学的联系和差别。