They asked the government to make ______clear to the public ______ they did was right.
The traffic rule says young children under the age of four and ____ less than 40 pounds must be in a child safety seat.
________ is the influence of TV that it can make a person famous overnight.
—I’m terribly sorry I forgot your name just now!—________—it happens to all of us!
I haven't finished my composition. I ________ for two hours and a half.
Last month I was lucky enough to have a chance to make a trip into _____ space with my friend Li Yan ping, _____ astronomer.