单项选择题
A.articles about how to obtain first-hand experience B.advertisements of different schools C.articles about important decisions D.introductions to summer school courses
A.through first-hand experience B.in the very countries C.through friendships with people D.through various sources of experience
A.If you are a tourist you will never have advantages in the USA. B.The first-hand experience will help you understand the culture in the USA, C.Do not hesitate to say "This summer I'll be studying in the USA." D.You can make a good decision after you read all the articles.