We __________ (work) for two hours by the time she came.
Last year he __________ (write) a novel. I don't know whether he __________ (finish) now.
Since 1977, CCTV __________ (broadcast) English programs.
The crazy fans __________ (wait) patiently for 2 hours, and they would wait till the movie star arrived.
Because the shop __________ (close) down, all the T-shirts are sold at half price.
Sales of CDs have greatly increased since the early 1990s, when people __________ (begin) to enjoy the advantages of this new technology.
It is said in the book that Thomas Edison __________ (be) the world's leading inventor for sixty years.
The number of deaths from heart disease will be reduced greatly if people __________ (persuade) to eat more fruit and vegetables.
—What were you doing when Tony phoned you?
—I had just finished my work and __________ (start) to take a shower.
The mayor says that the construction work __________ (complete) by 2013.