Viết lại câu: 1. They bought this house ten years ago.

Finish the second sentence in such a way that it means exactly the same as the first one:

1. They bought this house ten years ago.

They have ...........................................................................

2. When did you first know him?

How ...........................................................................

3. Their trip lasted three day.

They had ...........................................................................

4. She had to do the washing up but she didn't.

She forgot ...........................................................................

5. If you don't rest yourself you really will be ill

Unless ...........................................................................

6. Their teacher is making them study hard.

They ...........................................................................

7. It is necessary to finish the work today.

You need ...........................................................................

8. I advise you to take a holiday

You'd ...........................................................................

9. Since the invention of computer, people have saved a lot of time.

Since the computer .....................................................