31. ① Scientists have found their bones in many places, from Asia to North America. ② Present-day elephants have also survived in different environments, including very dry areas in Niger, grasslands in East Africa, and forests in West Africa. ③ Because of their great size and strength, elephants have always fascinated humans. ④ Elephants and their ancestors have been living on this planet for 5 million years. ⑤ Our fascination has almost caused African elephants to become extinct because of illegal hunting.
(A) ④ ① ② ③ ⑤
(B) ② ③ ① ④ ⑤
(C) ③ ① ⑤ ④ ②
(D) ⑤ ④ ① ③ ② ¯

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統計: A(8), B(3), C(2), D(2), E(0) #667336