The book was written in 1946, _______ the education system has witnessed great changes.
#76753
A
since then
B
when
C
since when
D
during which
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His younger sister may already be in high school now, in ___ case this picture book is too childish for her.
#76762
A
that
B
which
C
whose
D
what
A modern gymnasium has been set up in ________ was a wasteland ten years ago.
#75877
A
which
B
that
C
where
D
what
