Belle's father is off to the fair to show his new invention.（)
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They lived in a （luxury) hotel when they were on holiday.（)
All the servants in the castle hope that Belle can fall in love with the beast.（)
charitable is concerned with giving help to the poor.（)
一均质等截面直杆的重心在其全长的中点处，若把它完成半圆形，其重心在圆心处。（)
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