This method, ______in the area near Shanghai, resulted in a market rise in total production.

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问题 This method, ______in the area near Shanghai, resulted in a market rise in total production.

选项 A、trying
B、tried
C、was tried
D、has been tried

答案B

解析 该题测试过去分词短语用作定语的用法。tried相当于定语从句which was tried。A选项trying后缺少宾语,C选项和D选项则会造成动词重叠,或之间缺少必要的连词,故不用。
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