下面材料中“民族革命统一战线”的任务是（    ）

（Ⅰ）求数列{a_n}的通项公式；

（Ⅱ）证明： $\frac{n}{2}-\frac{1}{3}<\frac{a_1}{a_2}+\frac{a_2}{a_3}$ +… $+\frac{a_n}{a_{n+1}}<\frac{n}{2}$ （n∈N*）

①始终不渝地走和平发展道路         
②是建立国际新秩序的重要力量

③在国际社会发挥着重要作用         
④在国际社会的话语权不断提升

选择每组单词中不同类的一个。

①____A．shoes    B．skirt    C．hat       D．size

②____A．colour    B．pink    C．white     D．brown

③____A．ask       B．cry     C．magic    D．visit

④____A．wear      B．give    C．clever    D．nod

⑤____A．pair       B．great   C．beautiful  D．tiny

先通读下面的短文，掌握其大意，然后从A、B C、D四个选项中选择可以填入空白处的最佳答案。

    Tom began to learn to cook when he was six years old. At that time,he was ill in hospital．During the first three days there,Tom1a lot of TV cartoons and felt bored with them．Then he visited the Internet for fun．He 2an interesting website(网站)．It taught people how to cook．Tom was very3the pictures on the website and fell in love with(爱上)cooking．4he got better,Tom went back home and tried to learn to cook by himself．Tom spent most of his free time learning5to cook．He tried a lot of recipes(食谱)．

    Now after five years of6．Tom is a famous cook in his town．He also uses his cooking to make money7poor children in his town．He's already given them more than 10,000 dollars．He8has his own book to teach people to cook food．The book is quite popular．"When you9to do something，try your best to do it．Then you will be10one day!"said Tom．