How to use "disappointment" in a sentence

She looked at him with a mixture of disappointment and sadness in her eyes.

The stranger narrowed his eyes, trying to hide his disappointment and anger at Marius's calmness

"So soon?" Sala couldn't hide her disappointment.

Willis Bruckster stared at them, then crumpled his game card with obvious disappointment and disgust, as if he had lost a few hard-earned dollars.