她无法掩饰她的失望。

She couldn't ___disguise her disappointment.

她以秘书身份开始工作，小心翼翼地掩饰她的才能和精力，只是为了得到这份工作。

She started as a secretary, carefully ___disguising her talent and energy, just to land the job.

他试图用微笑掩饰他的愤怒。

He tried to ___disguise his anger with a smile.