Structure

Structure

Try this test!
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1) . 1000 species of finch have been identified.  
2) According to the economic laws, the greater the demand, the price.  
3) The continental United States is that there are four time zones.  
4) is necessary for the development of strong bones and teeth.  
5) withstands testing, we may not conclude that it is true, but we may retain it.  


Thank you!