The scientists are studying the effects of human activities______the environment.
#29004
A
in
B
at
C
on
D
with
推荐题目
No one can prevent the plans out.
#26898
A
to be carried
B
from carrying
C
not to carry
D
from being carried
_____ his arrival at the airport he was greeted by many teenagers holding flowers in their hands．
#28197
A
Upon
B
Within
C
Through
D
Beyond
.They lived a small island the coast of Fujian for five years.
#27625
A
on, on
B
in, off
C
at, on
D
on, off
My friend Martin was very sick with a strange fever; ________, he could neither eat nor sleep.
#26577
A
as a result
B
after all
C
in addition
D
in a word