1 . July 20, 1969 was an important day. Two     1     (美国) astronauts planted the first human footstep on the moon.     2     (他们的) names were Armstrong and Aldrin. They went into a spaceship whose name was Apollo. As Armstrong reached his left foot     3     (touch) the moon’s surface, he said, “That’s one small step for a man, but one big leap for mankind.”

    4     two hours and twenty-one minutes, the man carefully at first and then     5     (勇敢), walked on the moon,     6     (take) photos and picking stones. After eight    7     (day) stay in space, Apollo returned to the earth successfully. People everywhere were     8     (excite) by this moon trip. “This is the    9     (伟大) week in the history of the world since the Creation (创世),” President Nixon told the Travelers. “    10     (多亏，由于) what you have done, the world has never been closer together before.”