Safety in school has been of great concern (关注) because of recent reports about accidents _____ students got injured or killed at school.
#69660
A
for which
B
when
C
which
D
in which
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You can find whatever you need at the shopping centre,_____is always busy at the weekend.
#73692
A
that
B
where
C
what
D
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House prices vary from place to place and are usually high ____ there are famous schools.
#67577
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since
B
when
C
whether
D
where