Neil Armstrong (1) _______ into his microphone. And in less than two seconds the message that will live in the annals of exploration flew with the (2) _______ of radio to the huge telescope dish at Honeysuckle Creek, near Canberra, Australia, thence to the Comsat (3) _______ over the Pacific, then to the switching center at the Goddard Space Flight Center outside WashinGiải thíchon, D.C., and finally to Houston and the (4) _______ of the world: “That's one small step for a man, one giant leap for mankind.”

(4) ....................

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