[解析]
(1)D.细节理解题.根据第一段的We're trying to create a form of learning experience that is fun and is something you'd want to do instead of watching TV."可知,Ed Cooke 用Memrise努力将学习和娱乐结合起来.故选D.
(2)A.词义猜测题.根据 第三段的When you practice the words,you "water your plants". "water your plants" 意思是"学习生词".故选A.
(3)D.细节理解题.根据第四段的The app uses two principles about learning.The first is that people remember things better when they link them to a picture in their mind.可知,Memrise 通过应用联想记忆法学习.故选D.
(4)A.观点态度题.根据文章最后一段的句子"I know this won't make me a fluent speaker,but I hope I'll be able to do more than just smile when I meet people in Congo."可知,作者对Memrise是积极的态度,故选A.