Marco Polo is said to have sailed on _______Pacific Ocean on his way to Java in ______thirteenth century.

A．the; a            B．a;不填            C．不填;the          D．the; the

 Marco Polo is said to have sailed on ______ Pacific Ocean on his way to Java in ______ thirteenth century.

   A. the; a           B. a; /       C. /; the       D. the; the

Marco Polo is said to have sailed on _______Pacific Ocean on his way to Java in ______thirteenth century

1. A.
   the; a
2. B.
   a;不填
3. C.
   不填;the
4. D.
   the; the

Marco Polo is said to have sailed on _______Pacific Ocean on his way to Java in ______thirteenth century.