托福考试

根据网考网考试中心的统计分析，以下试题在2016-1-24日托福考试习题练习中，答错率较高，为：56%
【单选题】 The Franklin stove, invented around 1742, （）_, originally with a partially open front, and was designed to fit into a fireplace. 
A. was made of cast iron 
B. cast iron was made of 
C. cast of iron was made 
D. was of iron made cast 

参考答案：A，答错率：56%
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