At times the balance in nature is ______,resulting in a number of possibly unforeseen effects.
#20601
A
troubled
B
confused
C
disturbed
D
puzzled
推荐题目
I found ______ flowers on my way to the countryside last weekend.
#20438
A
some beautiful little red
B
some little red beautiful
C
some red little beautiful
D
some little beautiful red
Jack is late again. It is ________ of him to keep others waiting.
#20407
A
normal
B
ordinary
C
common
D
typical