The year of 2013 saw the_______ air pollution in China for 52 years.A. bad B. worse C. worst
The actors __________ in the movie.
—How many birds can you see in the trees?—I can see _________ birds in them.
—Where is Miss Wang?—She went to Hainan Island last week and will return _______ six days.
There will be _________ pollution this year than last year.
—Will people live to be 300 years old? —_________.