I enjoy fresh air so I always let the window open ________ it is really cold.
There are six floors ______our school building. Our class is ______ the third floor.
—Where does your uncle work? — He works in Paris, the capital of ______.
– Could you tell me the way to the post office? – ________.
–May I speak to Wang Gang, please?–.
–______ your new job ______, Jim? –Well, it is usually full of fun. But I have to keep busy.