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   ÷24=24:   =50%.

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20.~40.  30.~50.  60.~100.  20.~50.  
At 7:30.  At 7:40.  At 7:50.  
A.number of    The number of   A.lot of    Many of  
The number of, is    The number of, are   A.number of, is   A.number of, are  
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27.~50.℃  37.~50.℃  47.~50.℃  57.~59.℃  67.~70.℃  
38.~41.℃  45.~48.℃  48.~50.℃  50.~55.℃  
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