We were listening closely to the lecture yesterday evening when suddenly the light ________.
#101755
A
had been gone out
B
go out
C
was gone out
D
went out
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I       Beijing in a few days. Do you know when the earliest plant      ?
#101376
A
leaves for; takes off
B
am leaving for;is taking off
C
am leaving for; takes off
D
leave for; taking off
Half an hour has been made full ______ of _____ the problem.
#101674
A
using; studying
B
use; to study
C
to use; to study
D
use; studying