21.According to _____ survey conducted last month, _____ fourth of the post. 90’ s college graduates prefer online job-hunting.
A. a; a B. a； the C. the； a D. the； the
22.Watching TV used to be a lot _____. You had a limited number of channels to watch and you could only see your favorite programs at certain times.
A. cheaper B. dearer C. harder D. simpler
