Zhuoli Xie

A request for more detailed answer explanation on certain SAT questions

During my process of using SAT trainer for practice, I, as a person whose mother language is not English, have found the explanations for certain problems involving conventional word/phrase use les...

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2. SAT Questions and Feedback

Will AP World History get its Part 4 mastery questions?

Now in the AP World History, the 3th Part (600-1450) only have practice questions, while Part 4 (1450-present) simply has nothing to practice. Are there any plans to complete those questions? I am ...

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2. Content Requests and Feedback