根据首字母及句子意思在句子中填人适当的单词，使句子意思连贯语法正确。

1. Uncle Liu is a d_________, he works in a hospital.

2. We may feel s_________ when unhappy things happen to us.

3. Going to school w_________ breakfast is bad for your health.

4. In the south of China, people eat rice a lot and in the n_________ of China they often eat noodles.

5. Jane is good at English, but she is w_________ in Chinese.

影响商品价格的因素有多种，其中决定性的因素是（）

A.供求

B.使用价值

C.价值

D.居民收入