Susan was expecting her favourite singers, but to her disappointment, ______ appeared.
-- Ann is in hospital. -- Oh, really? I __ know. I __ go and visit her.
The population of Jiangsu __ to more than twice what it was in 1949. The figure is now approaching 74 million.
Some of you may have finished unit one. _____ , you can go on to unit two.
The government plans to bring in new laws _____ parents to take more responsibility for the education of their children.
The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.