______ apple fell from the tree and hit him on ______ head.

答案A
本题考查冠词的用法.泛指的单数名词apple前应该用不定冠词an,而在句型hit sb.in/on the face/head中,head,nose,face,eye等表示身体部位的名词前要用定冠词the.另外,考生还要注意这类名词前所用冠词的区别,head,nose等前面常用介词on,而face,eye等前面常用介词in.本句的意思是：从树上掉下一只苹果打中了他的头.对于这种题型,考生在复习时应该特别注意对不定冠词,定冠词,零冠词用法的掌握,同时还要掌握一些固定词组,比如：all the same,on the contrary,for the time being,in charge of,in the charge of等.