the workers spent three years ___ this bride 用build.tobuild .building built 哪个

building 工人们花了三个月的时间来建这座桥 sb spend 时间或金钱 doing sth 某人花…时间或金钱做某事

选building。
The workers spent three years building the bridge. 工人们花了三年时间修建这座桥。
spend time (in) doing sth. 花时间做某事

用building spent sometime doing sth

the workers spent three years _ building__ this bride.因为spend后+动词ing