被视为克服“市场失灵”最有效机制的社会组织是( )

A．股份制公司

B．公共部门

C．政府

D．第三部门

用所给单词的适当形式填空。

1.  The doctor said _______( taste)  food is bad for students' health.

2. Laura told me that she _______(main) eats fruit and vegetables.

3.  Most people are in_______(agree)  that fruit and vegetables are good for health.

4.  Eating _______( burn)  barbecued meat often might cause cancer.

5. People who eat a _______ ( balance) diet should be healthier than those who only eat meat.