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A: Must we...?
B: Yes, we must.
No, we don’t have to. / No, we needn’t.
3. How to prevent the flu?
First，…Second，…Third，…Finally…
记者，新闻工作者
high fever (>38°C)
dry cough
What are the symptoms of the flu?
breathing difficulties
muscle aches
chills and shivering
The flu spreads quickly among people.
We must exercise often to build us up.
使身体强壮
What should we do to prevent the flu?
We must keep the air fresh all the time.
一直
What should we do to prevent the flu?
crowded
We should keep away from crowded places.
拥挤的地方
What should we do to prevent the flu?
Flu is a serious illness, what should we do to prevent it？
Listen to 1a and check Dr. Li’s advice.
录音1a-P43
? 1.exercise often
? 2.keep the air fresh
? 3.go to bed early
? 4.wash hands and change clothes often