Excuse me, where is Mr Brown’s office?—Sorry, I don’t know. I ______ here for only a few days.

It is useless book to children. Put it into left drawer and never read it.

You don’t know ______ I want to see you again. It’s a year since I last saw you.

Have you ever been back to our primary school?—Yes,I go to see Mr Wang______.[ ]

We’re glad to see that Beijing is developing _______ these years than ever before.