You must be ＿nest time,or there may be another accident.A .carefully.B.careful.
问题描述：
You must be ＿nest time,or there may be another accident.A .carefully.B.careful.
答
careful, 选择B.
careful是形容词,形容词放在be动词和系动词后,修饰名词
carefully是副词,修饰的是动词