Tom, clean up the broken glass _________ someone walks on it.
#31009
A
since
B
when
C
before
D
as
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This pen is ___ mine, ___ his.
#79757
A
never, except
B
nor, also
C
not, but
D
not, or
John felt very embarrassed ________ he entered the government hall.
#30995
A
for the moment
B
the first time
C
for the first time
D
at the moment