Rewrite each of the sentences, beginning as shown, so that the meaning stays the same?

Exercise 3: Rewrite each of the sentences, beginning as shown, so that the meaning stays the same

1. When did you first know him?

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

2. Their trip lasted three day.

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

3. It may rain hard this afternoon, so take the rain coat with you.

In case.............................................. .................................................. ..........................

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

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

5. English id easy to learn.

It................................................ .................................................. ................................

6. Don't leave the lights on all night, you will waste electricity.

-» If................................................ .................................................. ................................

7. The furniture was too old to keep.

It was............................................... .................................................. ..........................

8. Gary is the best guitarist in her class.

No one else.............................................. .................................................. .................

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

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

10.It's necessary for everybody to clean up their neighborhood once a week.
Everybody......................................... ..................................................