However ,at time this balance in nature is
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However ,at time this balance in nature is ____resulting in a number of possibly unforeseen effect.
a.troubled b.disturbed c.confused d.puzzled
选B,disturbed
四个词都有“扰”的意思,但是：
trouble 指带来麻烦
disturb 指破坏秩序
confuse 指引起迷惑
puzzle 指用问题难住
破坏自然界的平衡,disturb是最合适的.
======以下答案可供参考======
供参考答案1:
B被打乱供参考答案2:
d