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
The old father ______ the project ten years ago but didn’t live long enough to complete it sohis sons and daughters ______ and are continuing doing it now.
#19246
A
came up; picked it up
B
put up; kept it up
C
took up; took it up
D
set up; brought it up
The higher the oil price is, ___________to the global economy.
#19380
A
the more damage will it cause
B
the more it will cause damage
C
the more damage it will cause
D
the more will it cause damage
In 1969 ____took his biggest step away from the earth. Americans first walked on the moon.This is certainly just a ____thought.
#19764
A
he,moving
B
people ,surprising
C
an astronaut, interesting
D
man ,beginning
This is the _____ piano on which the composer created some of his greatest works.
#20886
A
actual
B
genuine
C
real
D
original