根据首字母或汉语提示写单词。

1. The food you eat will make a difference if you want to keep _______ (健康的).

2. If you eat too much every day, you will put on w_______.            

3. The medicine had a good e_______ on her and soon she felt better.

4. His uncle is an _______ (专家) in heart disease.

5. Good health r_______ enough exercise and a balanced (均衡的) diet.

以下程序的输出结果是 #include＜iostream．h＞ long fun(int n) { long s；if (n＝1||n=2)s=2；else s=n-fun(n-1)； return s； } void main() {cout＜＜fun(3)；}

A．1

B．2

C．3

D．4