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 ______ is known to everybody is that the moon travels round the earth once every month.

A. As      B. What      C. That       D. It

_____ is known to everybody, the moon travels round the earth once every month.

A. It            B. As?               C. That             D. What

 _____ is known to everybody, the moon travels round the earth once every month.

A. It    B. As        C. That       D. What

_______ is known to everybody that the moon travels round the earth once every month.

A. It        B. As       C. That         D. What

       is known to everybody, the moon travels round the earth once every month.

A．It                B．As               C．That              D．Which

_____ is known to everybody, the moon travels round the earth once every month.

        is known to everybody that the moon travels round the earth once every month.

        A．It                                B．As                              C．That                          D．Which

________is known to everybody, the moon travels round the earth once every month.

A. It B. As

C. That D. What