However, at times this balance in nature is disturbed, ____ a number of possibly unforeseen effects.
#64143
A
lying in
B
calling in
C
existing in
D
resulting in
推荐题目
 Everything _____ doing is worthy of _____ well.
#68203
A
worthy; being done 
B
worth; being done
C
worthy; doing
D
worth; doing
You could have watched the movie Transformers 3 last night.Why _____ you?
#71225
A
didn’t
B
haven’t
C
hadn’t
D
shouldn’t
Hardly could he_____this amount of work in such a short time.
#81309
A
get through
B
get off
C
get into
D
get down