I was about to go to bed _____ one of my old classmates made a call to me.
#34755
A
when
B
as
C
while
D
that
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He told me that he would remember the days in Beijing University forever____ he got much help there from Professor Zhu.
#34614
A
where
B
which
C
that
D
when
Yao Ming has retired from the NBA, the pleasure we have got by watching him play basketball at home and abroad will last long．
#32702
A
Although
B
If
C
'Since
D
Once
Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.
#30775
A
even if
B
if only
C
in case
D
when