What does the sign mean?
---What should I do for the health of my teeth, doctor?--- Well, it’s best to ______ your teeth before you go to bed.
---_____ can we protect the environment in our daily lives?--- As for me, I think we are supposed to use both sides of paper and try not to use plastic bags.
--- Hey, Eric! What has happened?--- The lift is broken again! You know, I live on the _________ floor.
---I’m too nervous to give a speech before so many people. ---_______, Maria. You can do it.
Mom added some salt into the soup, ______ it still wasn't salty enough.
mean?
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