题目

Mr Reed made up his mind to devote all he had to ________ some schools for poor children. A．set up                                 B．setting up C．have set up                            D．having set up 答案：解析：句意：里德先生决定倾其所有为贫困儿童建造几所学校。 devote sth. to意为“把某物贡献给……”，to是介词，后可接动名词作宾语，构成devote sth. to doing sth.结构。 答案：B体循环是指血液由    进入主动脉，再流经全身的动脉、    、静脉，最后流经腔静脉流入    的循环．