[解析]
(1)B段落大意题.文章第一段先谈到非洲象的可爱,接着笔锋一转,谈到了保护非洲象工作还面临许多困难,所以其主要目的是告诉读者保护非洲象还有很多的工作要做.故选B。
(2)D细节理解题.从第三段的"The 21st century brings a﹣causing conflicts between local farmers and these big ani﹣mals."可知,对于非洲象的保护工作,目前面临最严重的挑战是大象无法与当地农民和平共处,故选D。
(3)A细节理解题.根据AWF researchers are searching for a way to give both elephants and people the space they need.以及The AWF is helping elephants by protecting their habitats.And they also work with local farmers to improve their life in order to encourage them to protect rather than destroy elephants.可知,AWF保护大象栖息地,和农民一起提高他们的生活水平,以及对大象作研究,没有提到饲养大象这一条,故选A。
(4)A.细节理解题.根据文章第二段Years ago,overhunting and the ivory trade were the biggest threats to elephants' survival.可知过度狩猎和象牙贸易是大象生存的最大威胁.故选A。