I bought the train tickets at the station easily during the spring rush, though ________ of them ________ it.

Is this school ________ my father studied in when he was a child.

—Is ________ here?—No, Peter and Tony have asked for leave.

It’s a little surprising that a house made of wood or bamboo may stay up in an earthquake while _______ made of steel and concrete may fall down.

A table made of steel costs more than ____ made of wood.