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【单选题】

Without facts,we can't form a correct opinion, for we need to have actual knowledge___________
our thinking.
[ ]

A.
which to be based
B.
which to base on
C.
on which to base
D.
where to base on
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参考答案:
参考解析:
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举一反三

【单选题】You____________ television.Why not do something more active?

A.
always watch
B.
are always watching
C.
have always watched
D.
have always been watching