单选题
交通银行
2015-12-10
By __________ a cheaper material for the steel in our products, we can greatly reduce
manufacturing costs.
A． substituting
B． replacing
C． alternating
D． displacing
参考答案
A
答案解析
句子表示“用更便宜的材料代替钢铁”，意为“用A代替B”的词组substitute A for B放在空格处的句意最自然，故选A。
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