----Why are the housing prices in big cities going up all the time?----One reason is that people are__________ into overcrowded cities in great numbers.
The population of the province to more than twice what it was in 1949. The figure is now approaching 74 million.
I asked for some more cake, but there was left.
—Is it OK to take this seat?—Sorry, .
-I didn't go to the art show, because I lost my ticket.-You______have borrowed mine I didn't go to see it anyway
Birds'singing is sometimes a warning to other birds________away.