根据句意及汉语提示完成下列句子

1. —Why is he often late for school?    

   —Sorry, I don't know the ______（原因）．

2. Would you like some____（甜食）?

3. Do you like apples or____（草莓）?

4. There are many____（特色菜）in that restaurant.

5. Can I have a look at your____（菜单）?

关于类风湿性关节炎特点的叙述正确的是（）。

A.局部性疾病

B.关节炎性改变

C.多表现在大关节

D.多呈非对称性

E.病程自限