He is an expert in petrology and is in charge of geology lectures.

He called me back immediately after he hung up the phone.

She suggested teaching sex education using a dildo.

He is good at making papier-mâché animals.

My pet is a hedgehog.

The echidna is a mammal native to Australia.

This museum exhibits old photos printed in collotype.

His speech had a change in emotion.

Please look at this poster.

She put a cute sticker on the wall of her room.