At times the balance in nature is____, resulting in a number of possibly unforeseen effects.
#68142
A
confused
B
puzzled
C
disturbed
D
troubled
推荐题目
If you can't __ your shyness,  you'll never pass the English oral test.
#64233
A
take off
B
get over
C
break off
D
give away
 I can’t _________ his rudeness anymore, so we began to quarrel.
#74739
A
keep up with
B
come up with
C
put up for
D
put up with