This hermit crab can perform autotomy when it senses danger, allowing it to escape from enemies.

She takes good care of her natural nails and never neglects them.

She often posts selfies on Instagram.

He took an oath to himself to succeed.

He made a self-oath to achieve his goals.

The government declared a state of emergency to prevent the spread of the new coronavirus.

His way of speaking is monotone, and I can't feel any emotion at all.

We won the top prize at the award ceremony.

We attended our grandfather's funeral yesterday.

I have my graduation ceremony tomorrow.