The shipworm is known for eating wood.

We crossed the sea by catamaran.

He engaged in an extravehicular activity from the spaceship.

He is undergoing training for extravehicular activity.

I have been to Hohhot.

He was playing by swinging the tree branch.

My grandfather is good at repairing old pendulum clocks.

The owl is hooting in the night forest.

He was solving the exam questions without looking away.

My friend works as a real estate agent.