3. 格林先生要你馬上去他的辦公室見他。

 Mr. Green asked you to see him in his office。

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  If you drop a feather and a hammer ( 鐵錘） , which do you think will hit the ground first?

  On his last moon walk in 1971,Apollo 15's Commander David Scott did his final 21 for the television cameras. Scott was re-creating an experiment  22 by the astronomer Galileo in 1590.

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