2. 公务员
  3. In the 1950s, a family that owned a farm near Beulah Michigan kept a bull【C1】________an elm (榆树). The bull paced around the tree

In the 1950s, a family that owned a farm near Beulah Michigan kept a bull【C1】________an elm (榆树). The bull paced around the tree

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问题     In the 1950s, a family that owned a farm near Beulah Michigan kept a bull【C1】________an elm (榆树). The bull paced around the tree,【C2】________the heavy iron chain, which led to a groove (fit) in the bark. The groove【C3】________over the years. Though for whatever【C4】________, it did not kill the tree.
    After some years, the family took their bull away. They cut the chain,【C5】________the loop around the tree and one link hanging down.
    Then one year, agricultural disaster【C6】________Michigan in the form of Dutch Elm Disease. All of the elms lining the road leading to the farm became【C7】________and died. Everyone thought that the old elm would be the next.
    The farm owners considered doing the safe thing: pulling it out and cutting it up into firewood【C8】________it died. But they simply could not bring themselves to do it. It was as if the old tree had become a family friend. So they decided to let nature take its course.
    Amazingly, the tree did not die. Nobody could【C9】________why it was the only elm still standing in the county!
    【C10】________experts from Michigan State University came out to observe the tree. They observed the scar left by the iron chain now almost completely covered by bark. The experts decided that it was the chain【C11】________saved the elm’s life. They reasoned that the tree must have absorbed so much iron from the chain that it became【C12】________to the virus.
    It’s said that what doesn’t kill you will make you stronger. Or as Earnest Hemingway put it " Life breaks us all but afterwards many of us are strongest at the broken places. "
【C12】
选项 A、exposed
B、addicted
C、immune
D、familiar
答案C
解析 句意：他们认为这棵树对病毒有了免疫力，它一定是从铁链上吸收了很多的铁。immune to表示“对……免疫，不受……感染”。故本题选C。
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