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
It is ______ to improve the working conditions for the construction workers.
#19349
A
worthwhile
B
worth
C
worthy
D
worthy of
This year there is ______ rain and the trees are ______ fruits.
#19848
A
a plenty of; abundant in
B
an abundance; abundant
C
an abundance of; abundant in
D
lots of; abundant
Employees in a chemical factory should be given _____ training in safety.
#19423
A
ambitious
B
adequate
C
absurd
D
autonomous
Nowadays, _______ cars are more and more popular.
#17878
A
electronic
B
electric
C
electrical
D
electricity
Wearing a（n） expression in the class, he was scolded by the teacher.
#18218
A
abstract
B
absent
C
conscious
D
sensitive