33. -- Mr. Black, this is our language lab. Would you like to go in and have a look?-- OK. .
The old scientist has been invited to a party ________ next Monday evening.
As soon as she entered the room, the girl caught sight of the flowers ________ by her mother.
________ he had won the first prize, he felt very happy.
________ their lessons, they went to the cinema.
He is from an ________ country.