He look_and ill.A.worry B.worrying C.worried D.worry about

He后应该为looks 或looked
feel感觉
look看起来
sound听起来
taste尝起来
smell闻起来
这些词是感官动词
相当于一个是动词be得用法,系动词+形容词,构成系表结构
he looks very young .她看上去很年轻.
the cakes taste good .这些蛋糕尝起来很好.
this song sounds very beautiful.这首歌听起来很美.
He looks worried and ill.
adj.困恼的,为难的；担心的
and 连接两个并列句,and (He looks 省略）ill 不好的,生病的

He looks worried and ill。在改正题目错误后选C。
这里的look为系动词，可理解为is。A为动词排除。B为形容词，意为“令人烦恼的”，C为形容词，意为“本身很烦恼”。根据句意“他看上去很烦恼像是生病了”因此他不是“令人烦恼”了，而是自己很烦恼。...

C.worried
担心的；发愁的；焦虑的