题目内容：

Marry has a bed cold.She has to stay in 【 】bed.该用什么冠词么

优质解答

第二个 bed 不用冠词,第一个 bed 的拼写错了,要改为 bad,Marry 的拼写应该是 Mary.
Mary has a bad cold.She has to stay in bed.
stay in bed 是固定搭配.
固定搭配就是习惯用法,不需要什么理由的.