Fifty years ago, wealthy people liked hunting？

Fifty years ago, most people lived in rural areas. But the world has changed. In the near

听力原文：Fifty years ago, Milton Friedman proposed a Voucher System to improve American ed

Fifty years ago, most peoples daily levels of activity were equivalent to walking three to

About 2000 years ago, the chinese paper was made （) the hair－like parts of certain pla

－－－ ____－－ Two years ago,A. Where did you goB. Do you like JapanC. When did you visit J

At the Mayan ruins we imagined what it() have been like 1 300 years ago when 30 000 people lived here.