In January , 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
Many people were afraid to go to swim when they remembered the scenes________ people were eaten by the big white shark.
—I visited China year. —That interesting.
Don’t take ________ for granted that your parents should support you all your life.
—May I speak to Tom, please? —But he ____ for work an hour ago.
Professor Li has earned a world ____ with his pioneer research in biochemistry.