Over the course of the eighteenth century, the average output of ironwork tripled as a result of sev...

题目信息

Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore.

A:Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore.

B:Over the course of the eighteenth century a tripling in the average output of ironwork was due to the replacement of charcoal by coal for the fuel used in the smelting of iron ore, in addition to several improvements in blowing machinery.

C:With charcoal's being replaced by coal as the fuel used in the smelting of iron ore and several improvements in blowing machinery, the average output of ironwork tripled over the eighteenth century.

D:The replacement of charcoal with coal for the fuel used in the smelting of iron ore and several improvements in blowing machinery, the average output of ironwork tripled over the eighteenth century.

E:Charcoal being replaced by coal as the fuel used in the smelting of iron ore, and several improvements in blowing machinery, which tripled the average output of ironwork over the course of the eighteenth century.

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正确答案： A:Over the course of the eighteenth century, the average output of ironwork tripled as a result of several improvements in blowing machinery and because coal replaced charcoal as the fuel used in the smelting of iron ore.

B选项和A选项相比，主语谓语发生了变化

A选项的主谓是：output trippled B选项的主语是：A trippling was due to

然后要考虑在前面介词短语over the course of the 18th century的修饰下，哪个是符合语义的。

显然语义想说的是output在18世纪期间trippled，而不是说A trippling 在18世纪是因为。。。潜台词就是说在非18世纪的年代就不是因为。。。了所以是不符合语义的，排除B。

C选项独立主格修饰语太长了，放在句首，头重脚轻。

D选项逗号前面的句子是名词成分，作为同位语，不能有效的表达出replacemnet&improvements和output trippled这两件事情之间的因果关系，所以不符合语义。

E选项有run on的语法错误，同时如果从语义上分析，E选项把output trippled设置成了从句内容，也是不符合逻辑语义的，一般从句都是描述的一个大背景，一个来烘托主句的大的背景环境，一般主句应该是持续动作短的内容，而从句应该是那个相对持续时间较长的背景内容，在这样的背景下，主句发生了

笔记