If you are traveling ________ the customs are really foreign to your own，please do as the Romans do.
#67465
A
in which
B
what
C
when
D
where
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Look out! Don’t get close to the house, ______ the roof is under repair．
#69668
A
whose
B
which
C
of which
D
that
I shall never forget the day Shen Zhou V was launched , has a great effect on my life .
#74144
A
when , which
B
that , which
C
which ,that
D
when , that