1.They  are going to have the pipes fixed in their house by the plumber.

2.How can those durian trees be to type the letter in the past.

3.She needs to improve her listening skill.

  Her listening skill needs improving.

4All the knowledge has to be revised carefully before the coming entance exam.

  All the knowledge needs revising carefully before the coming entance exam.

Chúc cậu học tốt nếu hay cho tớ xin 5sao+cautraloihaynhat nha!

=>

1. They are going to have the pipes fixed in their house by the plumber.

2. How can those durian trees be planted in your hometown?

3. That machine used to be used to type the letter in the past.

4. She needs to improve her listening skill.
Her listening skill needs to be improved.

5. All the knowledge has to be revised carefully by students in grade 9 before the coming entrance exam.
All the knowledge needs to be revised carefully by students in grade 9 before the coming entrance exam.