Her modesty is all put on; at heart she is very vain.

她谦逊全是, 内心里她是很虚荣。

I chatted up the paper's editor, feigning interest in his anecdotes .

我故意和报纸编辑攀谈，对他奇闻轶事很感兴。

He faked an interest in my work.

他对我工作感兴。

She assumed a look of sorrow.

她着悲伤样子。