从方框中选择合适的句子补全对话。

Students：Good afternoon, Miss Jiang.
Teacher：  Today, we’ll talk about a new bird flu. It has hit some Chinese cities.
Monitor：
Teacher：Yes, it is. It’s reported that about 35 people have been ill.
Monitor：  .
Teacher：We should keep away from animals. And we should wash our hands correctly.
Monitor： 
Teacher：It should take at least 20 seconds each time.  See a doctor at once if you have a high fever or have trouble breathing.