用所给词的正确形式填空。

1. The little boy fell off the tree and _____ (hurt) himself seriously.

2. She died after a long _____ (ill).

3. Doing eye exercises _____ ( be) good for your eyes.

4. Reading _____ (make)me happy.

5.There are many _____ (different)between the countryside and the big city.

抗氧化剂丁羟甲氧苯（BHA）适合的药液为（）

A.弱酸性药液

B.乙醇溶液

C.碱性药液

D.非水性药

E.油溶性维生素类（如维生素A、D.制剂