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　　Now men have already come into the Space Age. The Russian scientists sent the first man-made satellite into space on October 4, 1957．Soon after that scientists sent up several other satellites into space.

　　On July 16, 1969, the Americans sent up the Apollo Ⅱ into space. It carried three men to the moon. Four days later, Neil Armstrong, one of the three spacemen, became the first man to land on the moon.

　　Millions of people on that day sat by TV, watching this exciting moment. They saw the spacemen get off the spaceship, step onto the moon and walk about on it.

　　After he was back to the earth. Neil Armstrong said. “That's one small step for a man. but one big leap for mankind.”

　　Choose the right answer for each blank：

1．Men began to study apace ________.

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2．Men sent the first satellite into space ________.

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3．The first man landed on the moon ________.

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4．It was ________ to watch space man walk on the moon.

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5．The successful launching of the Apollo Ⅱ helped men to________.

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A．know more about the sun

B．make further study on the moon

C．get a better look at the moon

D．have better understanding of the stars