These natural parks are very important for preserving many animals, which would _______ run the risk of becoming extinct.

       A. otherwise   B. therefore    C. nevertheless       D. however

A


解析:

考查副詞詞義辨析。run the risk of意為“冒……的危險”。Otherwise要不然；therefore因此；nevertheless仍然，不過；however然而。根據(jù)句意最佳答案是A。

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