2. 外语
  3. 　　Most musicians agree that the best violins were made in Cremona, Italy, about 200 years ago. These violins sound better than a

　　Most musicians agree that the best violins were made in Cremona, Italy, about 200 years ago. These violins sound better than a

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问题 　　Most musicians agree that the best violins were made in Cremona, Italy, about 200 years ago. These violins sound better than any others. They even sound 【21】______ violins made today. Violin makers and scientists try to make 【22】______ like the old Italian violins. 【23】______ they aren’t the same. Musicians prefer the old ones. No one really knows 【24】______ these old Italian violins are so special, 【25】______ many people think they have an answer.
　　Some people think it is the age of the violins. But not all old violins sound wonderful. Only the old violins from Cremona are 【26】______ .
　　Other people think that the 【27】______ to those violins is the wood. The wood of the violin is very important. It must be from certain kinds of trees. It 【28】______ too young or too old. Perhaps the violin makers of Cremona knew 【29】______ special about wood for violins.
　　But the kind of wood may not be 【30】______ important. 【31】______ may be more important to cut the wood in a special way. Wood for a violin must be cut very carefully. It was to be the right size and 【32】______ . The smallest difference will change the sound of the violin. Musicians 【33】______ think that this was the secret of the Italians. 【34】______ they understood more than we do about how to cut the wood.
　　Size and shape may not be the answer 【35】______ Scientists measured these old violins very care- fully. They can make new ones that are exactly the same size and shape. But the violins do not sound 【36】______ the old ones. Some scientists think the secret may be the varnish. Varnish is what covers the wood of the violin. It makes the wood 【37】______ shiny. No one knows 【38】______ the Italian violin makers used in their varnish. So no one can make the same varnish today. There may never be other violins 【39】______ the violins of Cremona. And there are not very many of the old violins 【40】______ .  
【28】
选项 A、can be
B、may be
C、must not be
D、may not be
答案C
解析 联系前文“The wood of the violins is very important．”可以发现此处应该为否定的，所以排除A、B。must not be 表示“不可以”，具有强制性，规定性。may not be 表示“可能不”，与题意不符。
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