题目内容：

补全对话  从方框中所给的选项中选择正确的句子补全以下对话。(10分)

Students: Good morning, Miss Lin.

Miss Lin: 　 1.　　  Today, we'll talk about a new bird flu. It has hit some Chinese cities.

Monitor: 　 2.　

Miss Lin: Yes, it is. It's reported that about 35 people have been ill.

Monitor: 　 3.　

Miss Lin: We should keep away from animals. And we ought to wash our hands correctly.

Monitor: 　 4.　

Miss Lin: It should take at least 20 seconds each time. 　　5.　  See a doctor at once if you have a high fever or have trouble breathing.