[解析]
(1)D.细节理解题.根据Some people have very good memories and they can easily learn many things by heart,由于记忆力好很容易地记住许多东西,故选D.
(2)B.细节理解题.根据Everybody learns his mother language when he is a small child.大家都是在很小的时候就学自己的母语,故选B.
(3)C.细节理解题.根据He hears the sounds,remembers them and then he learns to speak可知在孩子会说话之前,他必须听和记住一些声音.故选C.
(4)D.细节理解题.根据because the pupils have so little time for it,and they are busy with other subjects,too.因为他想学习其他的功课,故选D.
(5)B.细节理解题.根据But your memory will become better and better when you do more and more exercises.但是你的记忆会变得更好,更当你做越来越多的练习,故选B