问题
选择题
At times the balance in nature is ______,resulting in a number of possibly unforeseen effects.
A.troubled
B.confused
C.disturbed
D.puzzled
答案
答案:C
trouble“麻烦,添麻烦”;confuse“使困惑”;puzzle“迷惑”;disturb“打乱,扰乱”。句意:有时候,自然界的平衡被打乱了,导致了无法预料的后果。所以C项正确。