Ecologists are trying to preserve our environment for future generations by protecting the ozone layer, purifying the air, and have planted the trees that have been cut down.
 | Phạm Văn Bắc | Chat Online |
| 05/09 11:42:01 (Tiếng Anh) |
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Ecologists are trying to preserve our environment for future generations by protecting the ozone layer, purifying the air, and have planted the trees that have been cut down.
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| A. to preserve 0 % | 0 phiếu |
| B. for 0 % | 0 phiếu |
| C. the ozone layer 0 % | 0 phiếu |
| D. have planted 0 % | 0 phiếu |
| Tổng cộng: | 0 trả lời |
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