The room was so quiet that she could hear the _____ of her heart.
Mary had taken _____ to see that her guests had everything that they could possibly want.
It isn't so much whether he works hard; the question is whether he works _____.
Expected noises are usually more _____ than unexpected ones of the like magnitude.
Experts say walking is one of the best ways for a person to _____ healthy.
Jack almost fell off the cliff, but managed to _____ until help came.