At times, the balance in nature is _____
题型:选择题
问题:
At times, the balance in nature is ________,resulting in a number of possibly unforeseen effects.[ ]
A. confused
B. puzzled
C. disturbed
D. troubled
At times, the balance in nature is ________,resulting in a number of possibly unforeseen effects.[ ]
A. confused
B. puzzled
C. disturbed
D. troubled