III. Viết lại các câu sau, dùng câu điều kiện loại 2.
1. The river is full of contaminants so many aquatic species are in danger.
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2. Because some students keep littering, the school playground is dirty.
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3. We burn oil and coal for energy so global warming occur.
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4. The tiger populations are on the decline because this species is overhunted for skin and bones.
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If the river didn't full of contaminants, so many aquatic species wouldn't in danger
If the students didn't keep littering, the school playground wouldn't be dirty
If we didn't burn oil and coal for energy, global warming couldn't occur
If we didn't overhunt for skin and bones, the tiger populations wouldn't be on the decline
III. Viết lại các câu sau, dùng câu điều kiện loại 2.
1. The river is full of contaminants so many aquatic species are in danger.
If the river was full of contaminants, many aquatic species would be in danger.
2. Because some students keep littering, the school playground is dirty.
If some students kept littering, the school playground would be dirty.
3. We burn oil and coal for energy so global warming occur.
If we burned oil and coal for energy, the global would be warm.
4. The tiger populations are on the decline because this species is overhunted for skin and bones.
_If this species was overhunted for skin and bones, the tiger would be on decline.