问题
选择题
John, ______, you should eat less meat but more vegetables.
A．keep healthy
B．keeps healthy
C． keeping healthy
D．to keep healthy
答案
答案：A
题目分析：keep healthy的意思是保持健康；BCD选项是它的变形。原句意思是：John，要保持健康，你应该少吃肉多吃蔬菜。这是祈使句，使用动词原形。故选A。