Lrge sums of money hve to ______ ech yer in pinting the steelwork of bridges, ships,Lrge s

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