II. Identify the mistake

21. You may put your money in a small coin bank in order keep it safe.

22. We wrote Katie’s name on the calendar so as to forget her birthday.

23. She stayed at work late in order to she could complete the report

24. I need some new clothes in order not take part in the party

25. Their new paint is excellent to covering walls with cracks in.

26. Trees are being planted by the roadside so that reduce tracffic noise.

27. I will wait here until she will come back.

28. It started to rain while the boys playing football.

29. I have worked here since I graduate

30. He had left by the time I come.

31. After I  finished my homework, I went to bed.

giúp mình với cảm ơn mnnnn