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

28. - File thứ 1: Anh 11 giua ky 2
Tiếng Anh File thứ 1: Anh 11 giua ky 2

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

A. 22 million

B. 12 million

C. 20 million

D. 21 million