參考答案：
【小題22】B
【小題23】A
【小題24】B
【小題25】D

習題解析：

【小題22】聽力原文開頭指出希臘哲學家亞里士多德對錢幣的特征做過描述，提到It must be lasting and easy to recognize, to divide, and to carry about.即錢幣必須具有持久性、易于辨認、分割、攜帶，選項B符合原文，故為答案-6us@KnvoVHo。
【小題23】聽力原文中提到Among isolated people,... commerce usually means barter. For this kind of simple trading, money is not needed...，即有些與世隔絕的人通常不使用錢幣進行交易，對于他們來說商業就是以物易物，故選項A為答案1#p-m,%9O*5i9~FXQ~。
【小題24】聽力原文提到Salt may seem rather a strange substance to use as money, but in countries where the food of the people is mainly vegetable, it is often an absolute necessity.由此可知，在一些以蔬菜為食的國家，鹽是一種必需品，他們往往會用鹽作為媒介進行交易，故選項B為答案Wb1FVo[1.yp^y9asu。另外三個選項屬于利用原文信息張冠李戴設置的干擾cDX1I=0oB&=。
【小題25】聽力原文提到The early money of China, apart from shell, was of bronze, often in flat, round pieces with a hole in the middle, called "cash". 由此可知，中國早期被稱為“現錢”的貨幣是中間帶孔的圓形銅錢，故選項D為答案ERuEd7@47@Cw。