美国政府于1933年创立民间资源保护队，从事诸如森林防护、植树造林、水土保持、历史景点维护等工作，每名队员每月可得30-45美元工资，高峰期的1936年，拥有队员达50万人。美国政府这一行动，实质上是一种（  ）

Her mother often helps ________. （  ）

邓小平曾说：如果六十年代中国没有……，中国就不能叫有重要影响的大国，就没有现在的国际地位。这些东西也是一个民族、一个国家兴旺发达的标志”。文中省略的史实是（   ）

    Do you know Chen Yixun? He is a great singer from Hong Kong. He has a lot of beautiful songs, so many people love him. This year Chen Yixun gives concerts (演唱会) in some cities in China. And on November 7 the concert is in Jiaxing.

    Chen Yixun wants to give great concerts, and he does a lot of work for that. First, he practises singing every day. And he always drinks warm water. There are also dances at the concerts, so he needs to practice dancing, too. It's a hard job. Then, he also needs to do exercise like running and swimming. He has to be healthy and strong for the concerts.

    “I have a busy life, but I love it. I enjoy singing and I wish to give great shows to people,” says Chen Yixun. Wish him good luck!