问题补充:
However,attimesthisbalanceinnatureis__,resultinginanumberofpossiblyunforeseeneffects.
A. troubled
B. disturbed
C. confused
D. puzzled
答案:
A. troubled
(答案→)B. disturbed
C. confused
D. puzzled
解析:从句子的后半部分的resultineffects可知balanceinnature受到了破坏。Disturb符合句义。