----The boy never has____breakfast.
----It’s___unhealthy habit.you must ask him to change it.
A．/,anB． the ,anC．/ ,aD． the ,an
A

試題分析：句意：這個男孩從來不吃早飯。那是不健康的生活習慣，你必須讓他改變。三餐、球類及學科名詞前用零冠詞。unhealthy的第一個因素是原因因素，結(jié)合句意，故選A.
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