You must be ______next time A.careful B.more careful C.carefully D.more carefull选那个理由是什么

You must be strong . you must be You must be hungry You must be joking You must be confident. You must be dreaming you must be careful you must be ___!(kid) You must be carful next You must be happy oh., you must be joking,救命 You Must Be Strong 歌词 You must certainly be happy i must be cull you you must be mistaken是什么意思? you must be out of you must be not true. You must be a_____in class