《2025年同步练习册河北教育出版社四年级英语上册冀教版》

1. Please keep off the grass.
2. Don't run, please.
3. Please walk on the right.
4. Don't litter, please.

答案： 1. grass
2. run
3. walk
4. Don't

I'm a robot guide dog (导盲犬). I help my owner (主人) every day. When I see this sign , I say, "Woof! Woof! 1. d" If I see this sign , I tell him, "Watch out! 2. c" When I see this sign , I say, "3. b Let's walk there." When I see this sign near the farm, I tell him, "4. a" I'm happy to help him. We are good friends.

答案： d c b a