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
His death in a car accident was _____ and we all got _____ at the news.
#18784
A
shocking; shocked
B
shocked; shocking
C
shocking; shocking
D
shocked; shocked
His girl friend wore a smile when seeing the nice dress she wanted.
#19149
A
satisfied
B
satisfying
C
being satisfied
D
satisfy[
How to balance the government's budget without raising taxes is a ______problem.
#20611
A
firm
B
tough
C
secure
D
stable
You’d better carry a(n) tyre in the back of your car in case it breaks down on the way.
#19801
A
extra
B
free
C
convenient
D
spare
-----How did you think of the job he did last week ?-----Well done. ______.
#59567
A
It couldn’t be worse
B
It should be better
C
It couldn’t have been better
D
It was worse