问题 
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              Which is the main idea of the last paragraph?A.Care about appearance in formal situations. 
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              The G20 is a(n) ______ organization.A.InternationalB.EuropeanC.RegionalD.Asian 
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              The King wears the royal______whenever there is a formal occasion.A.titleB.crownC.yachtD.w 
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              One big()of formal education is the high cost.A. advantageB. disadvantageC. strength 
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              The American Red Cross is one of the volunteer organizations ______ purpose is to help the 
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              Which of the following is NOT a limitation of organ transplantation?A.The organ donor must 
 
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