问题
选择题
----The boy never has____breakfast.
----It’s___unhealthy habit.you must ask him to change it.
A．/,an
B． the ,an
C．/ ,a
D． the ,an
答案
答案：A
题目分析：句意：这个男孩从来不吃早饭。那是不健康的生活习惯，你必须让他改变。三餐、球类及学科名词前用零冠词。unhealthy的第一个因素是原因因素，结合句意，故选A.