PAPER MONEY ...FOR OVER A THOUSAND YEARS.A. WILL REMINDING B....

49. - 30 BAI TRAC NGHIEM VOI KEYS FOR 9 P
30 BAI TRAC NGHIEM VOI KEYS FOR 9 P

49. Paper money ...for over a thousand years.

A. will reminding B. will to remind

C. would reminding D. would to remind

A. used B. is used C. has used D. has been used