单项选择题

They are the principles（）my wife and I have tried to（）our family.

A.which； bring about
B.in which； bring up
C.on which； bring up

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单项选择题

A.upon
B.on
C.over
D.off

单项选择题

A.can we learn
B.we can learn
C.we learn can
D.that we can learn

单项选择题

A.she realized
B.she had realized
C.had she realized
D.did she realize