读一读,找出下面句子的回答,把相对应的英文字母填在横线上。。
①Give me a ruler, please.____ A. Hi! Danny.
②Good afternoon, Kitty.____ B. Good morning.
③Here you are.____ C. Here you are.
④Hi. I'm Danny.____ D. Good afternoon, Alice.
⑤Good morning.____ E. Thank you!
6-2的相反数是____.