4. After being in the sun, use sunscreen every two hours.
3. Make sure there is at least one grown--up (成年人) that teaches lifesaving skills.
2. After you use sunscreen (防晒霜), give it 20 to 30 minutes to dry before you go outside.
1. Don't run anywhere in the pool area.
( ) 4. In Mrs. Green's class, we often play games.
( ) 3. In Mr. Black's class, students do not have much time to speak English.
( ) 2. Mr. Black told us that English was the most important language in the world.
( ) 1. This year our English teacher is still Mr. Black.
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