---- How long do you think it is______ he arrived here?---- No more than half a year, I believe.
Kate is really ______. She’s never angry with others.
Professor Nelson wanted to know ______.
Thousands of spectators came to Shanghai to ______ the 48th World Table Tennis Championships.
--- Tom, can you tell me __ ? --- Sorry, I don’t know.
---What is a left-luggage office? --- It’s a place where bags __ be left for a short time, especially at a station.