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 Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.

A. otherwise                   B. therefore                     C. though                      D. instead

 

【答案】

A

【解析】

试题分析:A否则,要不然;B因此;C然而;D代替,而不是;句意:对于保护很多野生动植物来说自然保护很重要,要不是这些动植物会有灭绝的危险。根据句意说明A项符合上下文。

考点:考察副词词义辨析

 

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