Taught Should Been 0 It

Question	It … more thoroughly.
Title	2874
QType (0=kprim,1=mc,2=sc)	2
Q_1	should have been taught
Q_2	should has been taught
Q_3	should had been taught
Answers	1 0 0

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Previous card: Improve perfect refine 这组词都有“改进，改善”的意思，其区别是：better 多用于口语，指适当地改善原来并非很差的状态或性质，也指社会地位、经济状况的改善。improve 最常用词，多指状态或性质上的深刻或重要改进，也可指自身能力的提高。perfect 语义强，通常指使方法、技术等达到完善美好的境地。refine 侧重指使语言、仪态等变得文雅、优美，也可指技艺等的提高

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