完形填空:

把下面五個句子放在文章中的恰當(dāng)位置,使文章完整。

  Three men went up in a balloon(氣球).They started early in London.The headman was Ted, and the other two men were Davy and Emilio.  1   Soon they heard the sea.They were carrying the usual rope(繩子),and it was hanging down from the basket of the balloon.At the end of the rope they had tied a metal box.This could hold water, or it could be empty.So   2  .It was for use over the sea.They were also carrying some bags of sand.

  After the sun rose, the balloon went higher.It went up to 3,000 metres, and   3  .The water in the balloon became ice.Snow fell past the men’s basket, and they could see more snow on the ground.  4  , but it was hard.They tried to break the icy sand with their knives, but it was not easy.The work was slow and they were still falling, so they had to drop some whole bags of sand.One of them fell on an icy lake and made a black hole in the ice.

  At last they pulled the box into the basket.It was still snowing; so   5  .They rose to 5,100 metres!Everything became icy.They were so cold that they decided to land.They came down in Poland heavily but safely.They had travelled 1,797 kilometres from London!

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