pretence

她假装开心的样子不过是个幌子，其实她很伤心。

Her cheerful ___pretence was just a cover for her sadness.

她假装懂艺术，但其实只是装模作样。

She made a ___pretence of knowing about art, but it was just an act.

他假装生病，但其实只是在找借口不去上班。

He kept up the ___pretence of being ill, but it was just an excuse to skip work.