Our new product is based on a(n) _______ concept.
Our new product is based on a(n) _______ concept.
A、ordinary
B、oldest
C、excellent
D、traditional
【正确答案】:D
【题目解析】:A:普通的  B:老的C:好的  D:传统的
句意:  我们的新产品是基于传统的的概念。 
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