According to the rules and regulations all payments be made in cash in the shopping cen

问题补充：

According to the rules and regulations, all payments be made in cash in the shopping center.

A. shall

B. can

C. must

D. should

答案：

(答案→)A. shall

B. can

C. must

D. should

解析：答案：A考查情态动词。句意为：根据规定，购物中心的所有款项都应以现金支付。情态动词shall用于第三人称时，表示“法律和条文等的规定”。故答案选A。