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According to the rules and regulations, all payments _____ be made in cash in the shopping center.
A.shall B.can C.must D.should
A

试题分析:shall多用于法律,条款中,表必须。句意:根据这些条约和规定,所有的款项必须在购物中心以现金方式支付。故选A。
can 
1). 表示体力或脑力方面的能力;
2). 表示允许、可能性。
must
1). 表示必须要做的事: 必须     
2) 表示很有把握的推断: 一定, 准是。
点评:情态动词即可表推测,也可表可能性,是高考必考考点。Shall:1) 在疑问句中, 用于第一、三人称表示说话人征求对方的意见或向对方请求。2) 用于二、三人称,表示说话人给对方的命令、警告、允诺等概念。
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