Viết lại câu không đổi nghĩa

21. You must clean the wall before you paint it. 
22. They are going to set up a new workshop in my school
23. Is she going to take the exam in June?
24. They are going to plant trees in the school garden this weekend.   
25. Are they going to clean the floor?                
26. The mechanic is going to repair my car.           
27. He is going to introduce his new collection this evening.
28. Our school is going to hold an English speaking contest next month.
29. They are going to build the bridge through my village.   
30. Mary is going to make a phone call to John.
31. Is she going to write a poem?             
32. She is going to study music at university.
33. Mr Blake is going to read this report at the conference.
33. They have to repair the engine of the car 
34. You mustn’t use this machine after 5.30 p.m             
35. John used to visit Mr Cole at weekends.    
giúp mik vs ạ