综合短文填空，选择正确单词填入相应的空格.

    People never travel as often as today in China. In the past, few people could travel on ____ to other countries. But today more and more Chinese people travel ____they now are becoming richer and have enough money for travel. The special plane for tourists ____ travel____ expensive than ever before. Most people enjoy ____ countries that are different from ____own. They also like to meet people and eat new food. Tourism causes many____  in Chinese people’s lives. People build new hotels and ____some people____ interesting places to ____ . Now Tourism is a big business.

***主席在会见中国少年先锋队第七次全国代表大会代表时说：“一个人可以有很多志向，但人生最重要的志向应该同祖国和人民联系在一起，这是人们各种具体志向的底盘，也是人生的脊梁”。主席的讲话告诫我们青年人（    ）

①理应承担我们的社会责任           ②热爱祖国，与祖国同呼吸、共命运

③自觉肩负伟大的历史使命           ④把握人生选择只考虑自己的实际需求

下列各数中，与﹣$\frac{1}{3}$的和为0的是（　　）