问题补充:
To keep, we should do more exercise and eat junk food.
A. healthy; more
B. unhealthy; more
C. unhealthy; less
D. healthy; less
答案:
A. healthy; more
B. unhealthy; more
C. unhealthy; less
(答案→)D. healthy; less
解析:句意: 为了保持健康,我们应该多做锻炼并且少吃垃圾食品。keep healthy 保持健康,在这个短语中要注意使用形容词形式;less 更少;more 更多。根据句意可知选D。