However, at times this balance in nature is ______, resulting in a number of possibly unforeseen effects.

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问题 However, at times this balance in nature is ______, resulting in a number of possibly unforeseen effects.

选项 A、troubled
B、disturbed
C、confused
D、puzzled

答案B

解析 四个选项的意思分别为:"麻烦,困扰,打扰";"打扰,打乱,打破";"困惑,迷惑不解";"迷惑,窘困"。根据句子主语部分"this balance in nature"(大自然的这种平衡)提示,应选择B项搭配。
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