2. 外语
  3. A man steps on what seems like solid ground but discovers with horror that the ground is giving way beneath his feet. The man st

A man steps on what seems like solid ground but discovers with horror that the ground is giving way beneath his feet. The man st

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问题     A man steps on what seems like solid ground but discovers with horror that the ground is giving way beneath his feet. The man struggles【B1】______, but he is mercilessly trapped. He cannot escape. Slowly he sinks deeper and deeper until at last he is gone, buried in the treacherous (骗人的，不可信的)earth. The solid ground was solid only in【B2】______. It was actually quicksand, which is a deep mass of fine sand【B3】______water.
    How is quicksand formed? Water pushes up from below the surface and is held by the sand. The 【B4】______of sand are forced apart by the water. They cannot hold any weight. The subsurface water may have come from a spring, a river, or a stream. Sometimes pools of water near beaches become filled with sand. When the soil under these pools does not allow for good drainage, the sand can become stretches of quicksand.
    Is it true that a man who steps into quicksand【B5】______die? No, four men have fought their way from quicksand to firm land again. It is【B6】______that creates the condition that can【B7】______death, for the more a person struggles, the worse matters become. Quick movements will make the sand yield【B8】______, but then it rushes and settles solidly around the body.
    A man trapped in quicksand should either【B9】______, or not move at all, except to stretch out his arms. When the weight of the sand his body has【B10】______equals his weight, he will stop sinking. With feet held still, and slow movements of arms, as in the backstroke in swimming men have managed to roll to safety and reach firm ground.
【B6】
选项
答案panic
解析 根据空格后的that creates，可知此处需单数或不可数名词，作从句的主语。panic“恐慌，惊慌”。
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