—The authors of computer viruses are geniuses.—I agree. If they applied their wisdom to other net technology _____ human beings can benefit, it would be better.
#28716
A
in which
B
through which
C
from which
D
during which
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I_____to go for a walk,but someone called and I couldn’t get away.
#28180
A
was planning
B
planned
C
had planned
D
would plan
_____entering the classroom, remember to take your seat and turn off your cell phone.
#25297
A
At
B
From
C
Upon
D
As
Hearing the news about the crash of Air France Flight 447, he became very concerned _______ his daughter on board.
#26771
A
in
B
with
C
about
D
at