问题:
However, at times this balance in nature is ________ resulting in a number of possibly unforeseen effects.
A. troubled B. bothered C mixed D. disturbed
However, at times this balance in nature is ________ resulting in a number of possibly unforeseen effects.
A. troubled B. bothered C mixed D. disturbed
A. troubled B. bothered C mixed D. disturbed
参考答案: