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_______ is well known to all that the earth is round
A That B with C It D As
_____ is well known to all that the earth is round
A. That B. with C. It D. As
_______ is well known to all, the earth is round
_____ is well known to all, the earth is round.
(1)________ is well known to all, the earth is round．
(2)________ is well known to all that the earth is round．
A．That
B．with
C．It
D．As