Paper money was in_________use in China when Marco Polo visited the country in_________

thirteenth century.

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

Paper money was in___________use in China when Marco Polo visited the country in __________thirteenth century.

A．the … /     B．the … the  C．/ … the       D．/ … /

Paper money was in ________ use in China when Marco Polo visited the country in ________ thirteenth century．

1. A.
   the；／
2. B.
   the；the
3. C.
   ／；the
4. D.
   ／；／

Paper money was in ____ use in China when Marco Polo visited the country in _____ thirteenth century.

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

Paper money was in       use in China when Marco Polo visited the country in

thirteenth century.
A. the；不填 　　 B. the；the　 　　C.不填；the 　　D.不填；不填