As long as I can remember, _______ I called, my son would answer.
#31892
A
before
B
any time
C
until
D
while
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Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody's life．
#31095
A
that
B
which
C
when
D
where
They are talking excitedly about the writers and their books ________ interest them.
#30886
A
who
B
whom
C
that
D
Which
We should consider the students’ request________ the school library should provide more books on popular science.
#31694
A
that
B
when
C
which
D
where