【正确答案】 D

【答案解析】[解析] 20-22 Hi, I'm Michael Armstrong, and I'm the president of the College Environmental Awareness Club. Before we get started, I'd like to thank everyone for coming down to the lake today to help with the cleaning-up project. As you probably know, we're going to be cleaning up all of the garbage here at the lake area. We'll begin by dividing into two ten-person teams. One team will pick up litter in the picnic area and jogging trail, and one will dig out garbage found in the shallow waters of the lake itself. We'll be putting the litter in these plastic trash bags. Toss any aluminum cans you find into these boxes, and we'll take them to the recycling center later. A local business has donated these "Do Not Litter" signs to the club. So we'll need a couple of people to place them around the lake when we are through. OK, everyone who wants to clean up around picnic tables and along the jogging path, raise your hands. 20. How will the club members work to clean up the area? 问，俱乐部成员会以怎样的工作方式清理这个地区?短文中明确提到，首先要将所有人分成两组，每组十人，所以正确答案为D。

【正确答案】 C

【答案解析】[解析] What will the club members do with the aluminum cans? 问，俱乐部成员将会如何处理铝罐?短文中，俱乐部主席嘱咐大家，捡到铝罐的时候将其扔进盒子里，然后他们会统一将其送到回收站，所以正确答案是C。

【正确答案】 A

【答案解析】[解析] Where will the club members put up the "Do Not Litter" signs? 问，俱乐部成员会把“不要乱扔垃圾”的标识竖在哪儿?短文最后明确提及：“我们需要两个人把标识绕着河边放一圈。”据此很明显得出正确答案为A。