It was quite a long time ______ I figured out what had happened to the manager.
#30771
A
after
B
before
C
when     
D
since
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Just as too much harmony is tiresome in music,________.
#79945
A
the life of too many benefits annoys us
B
so, in life, too many benefits annoy us
C
we are annoyed with lives also of too many benefits
D
a lot of benefits annoy us in life
I was about to leave _____ the telephone rang.
#31587
A
after
B
while
C
when
D
before