Alright class, now that we’re all dressed up let’s see what professions you chose. Ah, I see a fireman, a police officer, a medic, and a lifeguard! Can anyone tell me what these people have in common?

好了，同学们，现在我们都已经化妆了，来看看你们都选了什么职业。我看见有消防员，警察，医生和保镖。谁能告诉我这些职业有什么共性吗？

That’s right! Now class, if something bad happened and you had to get help, do you know what phone number you would call?

对。同学们，如果你碰到了麻烦必须求救，你们知道要拨打什么号码吗？

Yes, you would pick up the phone and dial 911. What are some emergency situations where you would need to dial 911?

对，你们需要拨打911.发生那些紧急状况你需要拨打911？

If there is an accident!

发生了交通事故。

If the fire alarm went on!

火灾警铃响起。