题目内容：

1.The advertisement offers information mainly to people from ________.

A. China B. America C. England D. Canada

2.We learn from the material that _______.

A. you can sign up on October 30th B. you can call for more information

C. the Great Wall Trek lasts for half a month D. the joiners can trek on the whole Great Wall

3.NSPCC has something to do with _______.

A. nature B. children C. the Great Wall D. standard network