1. (2021高二上·龙江期中) 单句改错

1. （1） Smartphones are being using by more and more teenagers.
3. （2） I am not surprised when I heard the good news.
5. （3） You may want to visit Hangzhou, that is famous for its natural beauty and history.
7. （4） These days we are exciting about the coming basketball matches.
9. （5） If you come across difficulties, you can turn to your teachers for some advices.
11. （6） Unfortunate, he fell off his bike and broke his leg.
13. （7） Nowadays, the earth is becoming hot and hotter.
15. （8） I taught me Englsih when I was young.
17. （9） I'm fond on playing basketball in my free time.
19. （10） We heard a trememdous explosion all of the sudden.