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Câu hỏi:
What is the serious problem of Lake Baikal in Russia?
- A. It has 1,300 rare species that do not exist anywhere else in the world.
- B. It is one of the largest lakes that contains a variety of animals and plants.
- C. It is polluted by massive volumes of industrial wastes discharged into it.
- D. It is the only lake in Russia whose source of water is not drinkable.
Lời giải tham khảo:
Đáp án đúng: C
Dẫn chứng: Yet, they are being destroyed by the massive volumes of industrial effluent which pour into the lake every day.
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