The technical cooperation and cultural __________ between the two countries are daily on the increase.

This book gives a brief _____ of the history of the castle and details of the art collection in the main hall.

Teachers have to constantly update their knowledge in order to maintain their professional(专业的)_______.

After long and hard work, the police at last discovered the         of the baby found by the side of a road.

 If you stand here, you’ll get a better________of the river.