题目内容
The balance of nature is _____ at times, resulting in a number of possibly unforeseen effects.
[ ]
A. confused
B. troubled
C. disturbed
D. harmed
B. troubled
C. disturbed
D. harmed
C
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相关题目
At times the balance in nature is____, resulting in a number of possibly unforeseen effects.
A.confused | B.puzzled | C.disturbed | D.troubled |