— I think the waiter has forgotten us. We ________ here for over half an hour! — I think you’re right. He probably thinks we have already ordered.
Mr. White _____ at 8:30 for the meeting, but he didn’t show up.
Only ____from university ____how difficult it was to make a good career.
This is the house _______ I once lived
______ is the richest man in our city?
Xi’an was the last city ______ he visited in China.