题干
补全对话，每空一词。
Maria: Charlie! Do you have an email friend?
Charlie: Yes, I ____.
Maria: Where is he ____?
Charlie: He's from Canada.
Maria: Does he have to do chores at home?
Charlie: Yes，he ____.
Maria: Where does he ____?
Charlie：He lives in Toronto.
Maria：I ____ it is very beautiful.
Charlie: He invites(邀请) me to his home.
Maria: Oh，that sounds wonderful.
答案(点此获取答案解析）
do,from,does,live,think
，为使入射的车灯光线经玻璃的折射、反射、再折射后恰好和入射光线平行，那么第一次入射的入射角是 