The Yangtze alligator is an endangered species in China.

An American alligator can move very quietly underwater.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

He started running swiftly.

He caught the ball with a quick movement.

He has acquired the skill of speedreading, allowing him to read many books.

He finished reading the book by speedreading.

Surprised by the sudden heavy rain, I forgot my umbrella.

He caught the ball with a swift movement.