- 單選題It is estimated that, currently, about 50, 000 species become（）every year.
- A 、extinct
- B 、instinct
- C 、distinct
- D 、intense
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參考答案【正確答案：A】
extinct意思是“滅絕的”。譯：據(jù)估計，當(dāng)前每年約有5萬種物種滅絕。instinct n.本能；distinct清楚的，截然不同的；intense強(qiáng)烈的。
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