该选那一个呀“Not having returned home yet,_________”,his father said to the police.A.his mother got worried B.his mother must be worriedC.I think he is missing D.he must have got into some trouble.

该选那一个呀“Not having returned home yet,_________”,his father said to the police.A.his mother got worried B.his mother must be worriedC.I think he is missing D.he must have got into some trouble.
该选那一个呀
“Not having returned home yet,_________”,his father said to the police.
A.his mother got worried B.his mother must be worried
C.I think he is missing D.he must have got into some trouble.

该选那一个呀“Not having returned home yet,_________”,his father said to the police.A.his mother got worried B.his mother must be worriedC.I think he is missing D.he must have got into some trouble.
选D.句意：他的父亲对警察说：“他还没有回家,所以他一定是遇到麻烦了.”
此题给出了非谓语动词短语结构,要求选主句,这时解题思路是所选句子的逻辑主语应该和非谓语动词短语的逻辑主语能保持一致,所以根据not having returned home yet,可以得出正确答案是D,没有回家的是he,不是his mother.
规律方法：
如果非谓语动词短语作状语,逻辑主语往往和句子主语保持一致.如果选非谓语动词,根据逻辑主语和动词成主谓关系,往往选现在分词； 如果呈被动关系,往往选过去分词； 但是如果反过来给出了非谓语动词结构而选句子,那么根据非谓语动词短语的逻辑主语往往和句子主语保持一致的原则而确定答案.
如果还有其他疑问,可以去“状元365”提问.

D.he must have got into some trouble.