Question 29. (passive voice) My father will paint our house tomorrow.
→ Our house will be painted by my father tomorrow 
Question 30. (passive voice) Mark opens the box.
→ The box is opened by Mark
Question 31. (combination) I have a sore throat. I want to eat an ice cream (so/but/and/or)
→I have a sore throat but I want to eat an ice cream

Question 29. (passive voice) My father will paint our house tomorrow.
→ Our house will be painted tomorrow by my father.
Question 30. (passive voice) Mark opens the box.
→ The box is opened by Mark.
Question 31. (combination) I have a sore throat. I want to eat an ice cream (so/but/and/or)
→I want to eat an ice cream but I have a sore throat.

Question 29. (passive voice) My father will paint our house tomorrow.
→ Our house will be painted tomorrow by my father.
Question 30. (passive voice) Mark opens the box.
→ The box is opened by Mark.
Question 31. (combination) I have a sore throat. I want to eat an ice cream (so/but/and/or)
→I want to eat an ice cream but I have a sore throat.