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viết lại câu để câu thứ 2 giống nghĩa với câu thứ nhất
1. Students are more aware of protecting the environment. Teachers teach environmental issuses at school.
=> If ....................................................................................
2. People speak English all over the world.
=> English .............................................................................
3. Many rivers and lakes are poisoned. Factories produce waste and pour it into rivers and lakes.
=> Because ..........................................................
4. They provided food then cleared up the debris .
=> After they .........................................................................
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Sinh Học lớp 12
