THE ESTIMATED NUMBER OF STAMP COLLECTORS IN THE UNITED STATES IS __...

1. - DE KIEM TRA DINH KY SO 4 LOP 11 CB
Lớp 11 Tiếng Anh DE KIEM TRA DINH KY SO 4 LOP 11 CB

1. The estimated number of stamp collectors in the United States is _________.

A. 30 million B. 20 million C. 10 million D. 15 million