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 caught the ball with a swift movement.

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

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

He finished reading the book by speedreading.

He started running swiftly.

He caught the ball with a quick movement.