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【简答题】
It is hard for us to focus more than ________ minutes.
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【简答题】Each new school year brings fresh reminders of what educators call the summer learning gap．Some call it the summer learning setback Put simply, it means the longer kids are out of school，the more they...
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【简答题】Each new school year brings fresh reminders of what educators call the summer learning gap. Some call it the summer learning setback. Simply speaking, it means the longer kids are out of school, the m...
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