The shrinking range poses______to Africa’s elephants.

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问题 The shrinking range poses______to Africa’s elephants.

选项 A、a graver threat that is long-term
B、long-term the gravest threat
C、the gravest long-term threat
D、a long-term threat graver

答案C

解析 句意:日益缩小的(生存)空间是非洲象面临的最严峻的长期威胁。pose…threat to…对…造成威胁。
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