阅读下面短文，掌握其大意，然后根据短文内容，在短文空白处填入适当的单词，使短文内容通顺，合理。（每小题1分, 共5小题，共5分。）

Do you want to improve your English? Doctor Li gives you some 小题1:_____      . First , it’s a good 小题2:      to watch English films or listen to English songs. Second , try to read English newspaper and listen to English radio. They are goodfor your English. Third, try not to be小题3:   when you start a conversation(对话) in English . Do you find it difficult to remember（记得） the English words? You should remember eight or ten words a day. Fourth, how about writing the words on the wall or小题4:     the English names for everything you see？Work hard, and you can learn English小题5:        .

机体内缺乏可致角膜干燥的营养素是（）

A.蛋白质

B.脂肪

C.糖类

D.维生素B₂

E.维生素A