However, at times this balance in nature is disturbed, _______ a number of possibly unforeseen effects.
#67437
A
lying in
B
calling in
C
taking in
D
resulting in
推荐题目
Those who are ______ their present situation will surely make no more advance in life.
#82418
A
content to
B
satisfied of
C
pleased to
D
content with
He used to ____his teaching when he was young.
#81703
A
devote to
B
be devoted to
C
devoting to
D
being devoted to
Because of the strong sun Mrs. William's new dining room curtains _____ from dark blue to gray within a year.
#81819
A
faded
B
fainted
C
paled
D
diminished
Scientists are convinced _____the positive effect of laughter _____physical and mental health．
#70992
A
of ;on
B
by; in
C
of ; at
D
on ;at
We no longer keep up the close friendship of few years ago, though we still visit each other_____.
#81441
A
in good time
B
up to date
C
on occasion
D
once and for all