1. I was the only one (who realized) her.

2. I have some homework (which I should have done) yesterday.

3. Our solar system is in a galaxy (that is called) the Milky Way.

4. I was awakened by the sound of laughter (which came) from the next room.

5. There are six reports (which have to be typed) today.

 6. We had a river (in which we could swim.)

7. Here are some accounts (that you must check.)

8. The last student (that was interviewed) was Tom.

9. We visited Hanoi, (which is the capital of VN.)

10. My father, (who is a pilot) , often goes abroad.