They healthy and they healthy food.
A. all are, often eat
B. are all, eat often
C. all are, eat often
D. are all, often eat
网友回答
A. all are, often eat
B. are all, eat often
C. all are, eat often
(答案→)D. are all, often eat
解析：本题的含义是他们都健康，他们经常吃健康食物，all和often用在句中的位置为在be动词，情态动词，助动词之后，其它动词之前，故选D。