You must keep in good.A. healthyB. healthC. unhealthyD. healthily

问题补充：

You must keep in good.

A. healthy

B. health

C. unhealthy

D. healthily

答案：

A. healthy

(答案→)B. health

C. unhealthy

D. healthily

解析：此题重点考查固定短语keep in good health表示保持身体健康。故选B。