例句： These books are turning yellow and brittle.

例句： The striking office workers have occupied the whole building.

例句： The goods have been cased up for transport.

例句： Snow is an unusual sight in this warm place.

例句： His encounter with the guard dog had completely unnerved him.

例句： I'll send someone to show you around.

例句： An electron has a negative charge, a proton has a positive charge.

例句： The news of her death circulated quickly.

例句： I cracked two eggs into the frying pan.

例句： Do you know who is the foremost writer in the English language?