他的笑容显得不真诚且虚伪。

His smile seemed insincere and ___false.

他许下了许多他从未打算履行的虚假承诺。

He made many ___false promises that he never intended to keep.

我觉得他的公众形象完全是虚伪的。

I find his public persona to be completely ___false.