题目内容：

__Tom was worried about seemed clearly to the whole family
a.that b,something c.what.d.anything

优质解答

C,what Tom was worried about 做整个句子的主语,表示汤姆所担心的事情.就等于The thing that Tom was worried about.
翻译：汤姆所担心的事情全家人都知道.