Đáp án:

1. The cashier used to do the accounts

 ->The accounts used to be done by the cashier

2. They have bought a new house since last week

-> A new house have been bought since last week

3.We are going to grow flowers in the front of garden

-> Flowers is going to be grown in front of the garden

4. Are they cleaning the floor now ?

-> Is the floor being cleaned now?

5. My family usually waters the plants and flowers in the late afternoon ?

->The plants and flowers are usually watered by my family in the late afternoon?

6. They fought the battle in 1623

->The battle was fought in 1623 

cho mik tl hay nhất nha chúc bạn học tốt^^

1. The accounts used to be done by the cashier

2. A new house have been bought since last week

3. Flowers is going to be grown in front of the garden

4. Is the floor being cleaned now?

5. The plants and flowers are usually watered by my family in the late afternoon?

6. The battle was fought in 1623