It’s more than half a century _________ my grandfather joined the Party and became a servant to the people.
#71853
A
when
B
that
C
since
D
while
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---How long have you been studying at this school? --- I have been studying here­­­­____.
#41315
A
since I was thirteen years old
B
when I was thirteen
C
at the age of thirteen
D
after I was thirteen