1 . These patterns are unique to each person. T________ (因此), the keyboard can determine people’s identities. (根据中英文提示填空）

2 . Tomorrow is September 30. Have you made all your travel ________ (安排)? （根据汉语提示单词拼写）

3 . —Are you paying in cash or by ________ (信用) card? （根据汉语提示单词拼写）
—I’ll pay in cash.

4 . Protecting the natural environment includes keeping the original environment untouched, as well as accepting new, _________ (不破坏环境的) ways of feeding farm animals.(根据汉语提示单词拼写)