问题
选择题
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
答案
答案：D
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。