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pollution
passengers
crazy
disagreed
anywhere
Review
Advantages
1. __________
2. __________
3. __________
…
Review
She is wearing a _______.
helmet
Do you think it necessary for a bike rider to wear a helmet?
What does she use it for?
Pre-listening
Word formation
useless adj.
use v.
→
useful adj.
careless adj.
care v.
→
careful adj.
helpless adj.
help v.
→
helpful adj.