A proposal has been put forward at a recent video conference _______ measures be taken to raise the citizens’ awareness of traffic safety. 
#66832
A
that
B
as
C
when
D
which
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However _______, it’s worth it and I’ll get it .
#67730
A
the watch costs
B
much the watch costs
C
the watch will cost
D
much does the watch cost
She wrote a month ago, ______ we’ve heard nothing. 
#73446
A
since when
B
before which
C
since that
D
after which