题目

Looking forward to having fun in the following summer. Come to be volunteers! Summer Camp Offer you a chance to lead children in games, sports and art. Date: June 25—July 28, Mondays & Fridays Time: 10:00 a. m.—5:00 p. m.Farm Volunteer We are looking for volunteers in three types: chicken feeding, tomato planting and horse training. Date: July 15—August 20,Sundays. Time: 9:00 a. m. —3:30 p. m.Volleyball Club Volleyball volunteers teach kids basic skills of playing volleyball, and have a chance to play it on the beach. Date: June 25—August 30, Thursdays Time: 9:00 a. m.—4:00 p. 20世纪60年代推行的“绿色革命”，其主要目的是为了解决（ ）A．人口问题B．环境问题C．气候问题D．粮食问题