Many tall buildings _______ in Shanghai in the past few years.
How much more expensive do you think a flat in a downtown area is than ______ in a suburban area?
–Mary looks down today, what’s up? --Well, ________happened between Mary and me is none of your business.
With a large amount of work ______, the chief manager couldn’t spare time for a holiday.
You have no idea what I’ve had to ________ during the last few days.
Mr. Smith has a great interest in_______history, especially in_______history of the Ming Dynasty.