问题详情

A
Hello，everyone! It"s that time of year again! Hualin"s fantastic sale! You name it， and we have it at a very good price． Do you like them at low prices？ We have sweat-ers in all colors at 50 yuan each! Do you need a bag for sports or school？ We have great .bags for just 6 yuan! For young boys and girls， we have T-shirts in red， green，yellow， orange， blue and black for only 15 yuan! And socks in all colors for just 1yuan! And that-s not all． Can-t you believe it？ Come down to Hualin and see by your-self!
()21． This passage is_________
A． a story
B． an advertisement(广告)
C． about family
D． about buying and selling