34 câu Trắc nghiệm Tiếng Anh 12 Cánh diều Chuyên đề 20: Đọc hiểu trả lời câu hỏi (Reading Comprehension)

What was the main threat to biodiversity in Hawaii and other islands in the Pacific and Indian oceans until recently? A. vulnerable rich ecosystems

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What was the main threat to biodiversity in Hawaii and other islands in the Pacific and Indian oceans until recently? 

vulnerable rich ecosystems

hunters and introduced predators

tools used by human beings

human assault on ecosystems

Giải thích

Chọn đáp án B