9. Complete the sentences, using the correct form of the words in brackets.

Câu hỏi :

9. Complete the sentences, using the correct form of the words in brackets.

* Đáp án

* Hướng dẫn giải

1. polluted                    2. unable                     3. environmental         4. Natural

5. harmful                    6. contaminated          7. illustration               8. poisonous

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