However，at times this balance in nature is＿＿，resulting in anumber of possibly unforeseen effects．
#20358
A
troubled
B
disturbed
C
confused
D
puzzled
推荐题目
A government official was murdered last Friday and the police are collecting information that is________to the case.
#19315
A
relevant to
B
similar to
C
devoted to
D
addicted to
You can never be ________ when crossing the street.
#19693
A
very careful
B
too careful
C
carefully enough
D
enough careful
Not ______ openly may make one’s point confusing, while careless words are ______ to hurt others’ feelings.
#18029
A
to speak, possible
B
speak, probable
C
speaking, likely
D
spoken, sure