用所给词的正确形式填空。

1. Alice is the best            in her school. (sing)

2. Where does she            now? Does she enjoy            in China? (live)

3. Who will be the            to speak at the meeting this afternoon? (three)

4. Could I have one of your           , please? (photo)

5. What do these            usually do on            day? (child)

6. Ann is thinking about what            to her friend. (write)

7. You can get this kind of            in that            shop. (shoe)

感染性发热最常见的病原体是（）

A.病毒

B.立克次体

C.细菌

D.真菌

E.肺炎支原体