1. It’s very important to keep the environment clean.
2. The time machine will be shown to the public when it is finished.
3. A bunch of flowers have been given to her (by them)
4. People recycle old car tires to make shoes and sandals.
5. There are sixteen units in this textbook.
6. I haven’t spoken to her for three years.
7. Tam used to type faster than she can/ does now.
8. My father asked me to turn down the radio for him.
9. It’s Lan’s fifteenth birthday next week.
10. When did you use the pen?

Bài Làm :

1. Keeping the environment clean is very important. 

 -> It's important to keep the environment clean.

2. They will show the time machine to the public when they finish it.

 -> The time machine will be shown to the public when it is finished. 

3. They have given her a bunch of flowers.

 -> A bunch of flowers has been given to her.

4. Old car tires are recycled to make shoes and sandals.

 -> People recycled old car tires to make shoes and sandals.

5. This textbook has sixteen units.

 -> There are sixteen units in this textbook.

6. It’s three years since I last spoke to her. 

 ->  I haven't spoken to her for 3 years.

7. Tam doesn’t type as fast as she used to.

 -> Tam used Tam used to type faster than now.

8. “ Please turn down the radio for me, ” said my father.

 -> My father asked me to turn down the radio for him.

9. Lan will be fifteen next week.

 -> It is Lan's fifteenth birthday next week.

10. How long is it since you used the pen ?

 -> When did you use the pen ?