你是王剛(Wang Gang)，寫一封給朋友李明(Li Ming)的祝賀信，祝賀他獲得復旦大學計算機科學碩士學位，并祝他今后在學習和研究方面取得成功。

According to Paragraph 1,why does the author scratch his head?

• A、Because he doesn' t know what to do once schools are closed
  
  

• B、Because he is not sure about the practicability of those new tests

• C、Because he is concerned that many teachers will lose their jobs

• D、Because he is not in favor of the government' s reform efforts.

What is the passage mainly about?

• A、Selection process of rescue dogs.

• B、Qualities and training of rescue dogs.

• C、Risks rescue dogs are faced with.

• D、Types of tasks rescue dogs can perform.