网址：http://m.1010jiajiao.com/timu3_id_3163512[举报]
They are selling everything at a ___________ (折扣).
Our boss could have sold more goods if he had promised to offer a 40% ____________(折扣).
Mary is a ______customer of that shop; That’s why sometimes she is given a small discount(折扣)
A. common B. usual C. regular D. average
翻译句子。
我提前预定了房间，有20％的折扣。(book; discount)
________________．