1 . Bill Gates was a ____to his computer as a child. (liking something so much that you do not want to stop doing it or having it) (根据首字母和英文释义单词拼写)
2 . The chemical most popular with the farmers was toxaphene, one of the most d
3 . The United States Office of Plant Introduction alone has introduced almost 200,000 species and v
4 . And as they moved north, their clothes, hunting strategies and other s