Scientists have done a lot of study to show that praise is far(effective)_______

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问题 Scientists have done a lot of study to show that praise is far(effective)_______than criticism in improving students’ behavior.

选项

答案 more effective

解析从结构上看,than暗示题中要用比较级,effective为多音节词,故其比较级形式为more +多音节词。

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