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.troubled
B.confused
C.disturbed
D.puzzled
At times the balance in nature is ______,resulting in a number of possibly unforeseen effects.
A.troubled
B.confused
C.disturbed
D.puzzled