答案：1. Jimmy must remain in bed for another two days.
解析：“必须再卧床两天”用“must remain in bed for another two days”。
2. He can get up for two hours every day, but you must keep the room warm.
解析：“可以每天起来两个小时”用“can get up for two hours every day”，“保持房间温暖”用“keep the room warm”。
3. You mustn't eat rich food.
解析：“不许吃”用“mustn't eat”，“油腻的食物”用“rich food”。
4. Does he still have a temperature?
解析：“还发烧吗”用“Does he still have a temperature?”。
5. You look better today.
解析：“看上去好多了”用“look better”。