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
 Lingling has gone to England for a ______ English course.
#34841
A
six month
B
six months
C
six-month
D
six-months
_____box cannot be lifted by a boy of five. 
#20746
A
So a heavy
B
So heavy a
C
A such heavy
D
Such heavy a
Of the two coats, I’d choose the __________ one to spare some money for a book. 
#20682
A
cheapest
B
cheaper
C
more expensive
D
most expensive