1. (2021高三上·长春月考) 单句改错

1. （1） They were presented with flowers at arrival at the airport.
3. （2） Have you seen trees whose leaves open at the sunrise and close at night?
5. （3） The jellyfish is a potential dangerous sea animal.
7. （4） He is that you call a “walking dictionary”; he knows almost every word.
9. （5） Pollen becomes attaching to the animal during its visit to a flower.
11. （6） Whatever good you are at a subject, you might make mistakes if you are careless.
13. （7） We believe exposed to advertisements constantly can help to change our opinions.
15. （8） When it comes to learn English, she really has much to say.
17. （9） The news which he intended to come gave us much pleasure.
19. （10） As usual, the team was taking a shower after the match.