Traditionally, college students hold a graduation ceremony to encourage themselves before they ____on their life journey.
—I’m afraid I must be off now. —_________.
、Martha Berry was named one of _____ women in the United States.
—What made ber so sad? —______a good chance to go abroad.
A professor of biology gave a talk to more than 1000 students on elephants living conditions and the dangers _______ them.