You must be more _____next time.是careful 还是carefully

You must be more _____next time.是careful 还是carefully 英文语法you must drive more carefully next time 为什么不能用Careful You must be ______next time A.careful B.more careful C.caref You should be more careful next time. You ___ be more careful next time. be more careful next time,will you "you must be more careful next time .”our English teacher sa 单用时是Be carefully还是Be careful?Why? She 'll be ____ next time A more carefully B more careful C you must be careful You must be more careful when____(cross) the crowded streets 英语高手请进1.You must be_____next time.A.careful B.more careful C