《水浒》写武松打虎之前，有这么一段话：“当日晌午时分，走得肚中饥饿，望见前面有一个酒店，挑着一面大旗在门前，上面写着五个字：‘三碗不过岗’。”

从现代商品经济的观点来看，“三碗不过岗”是绝妙的广告词。它究竟蕴含着酒店主人怎样的用心？请回答出三点：（3分）

答：⑴_______         _____⑵_______        ______⑶__________   __________

All those second-hand goods are sold at        before.

A．30% as lower price as

B．as 30% low price as

C．30% as low a price as

D．30% lower price than