將下列數(shù)字按要求排列。
1. three  nine  five  six  four  ten  eleven  eight
    從小到大:                                             
2. eighteen  fifteen  seventeen  twenty  thirteen
    從大到。                                              
3. four  seven  ten  six  three  fourteen  nine  five
    寫雙數(shù):                                                  
1. three four five six eight nine ten eleven
2. twenty eighteen seventeen fifteen thirteen
3. four ten six fourteen
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