提交流程图 评分标准：画出整体的流程图以及三个关键模块（自选）的流程图 ——10分，整体流程图4分，其余每个2分；

ums of money hve to ______ ech yer in pinting the steelwork of bridges, ships,nd other exposed structures.spend B．be spending C．be spent D．hve spentA．spendB．be spendingC．be spentD．have spent